train_FEVER_jointly_fine_fine_twocontext.py

import cPickle
import gzip
import os
import sys
sys.setrecursionlimit(6000)
import time
import math
import numpy as np
import theano
import theano.tensor as T
from theano.sandbox.rng_mrg import MRG_RandomStreams as RandomStreams
import random

from logistic_sgd import LogisticRegression
from mlp import HiddenLayer
from theano.tensor.signal import downsample
from random import shuffle
from theano.tensor.nnet.bn import batch_normalization

from load_data import load_fever_train,  load_fever_dev, load_fever_train_NoEnoughInfo, load_fever_dev_NoEnoughInfo
from common_functions import store_model_to_file,Attentive_Conv_for_Pair_easy_version,load_word2vec,load_word2vec_to_init, store_model_to_file, elementwise_is_two,Conv_with_Mask_with_Gate, Conv_with_Mask, create_conv_para, L2norm_paraList, create_HiddenLayer_para, create_ensemble_para, cosine_matrix1_matrix2_rowwise, Diversify_Reg, Gradient_Cost_Para, GRU_Batch_Tensor_Input_with_Mask, create_LSTM_para

from preprocess import compute_f1_two_list_names,compute_f1_recall_two_list_names
from fever_scorer import fever_score
'''

'''

def evaluate_lenet5(learning_rate=0.02, n_epochs=100, emb_size=300, batch_size=50, filter_size=[3], sent_len=40, claim_len=40, cand_size=10,hidden_size=[300,300], max_pred_pick=5):

    model_options = locals().copy()
    print "model options", model_options

    pred_id2label = {1:'SUPPORTS', 0:'REFUTES', 2:'NOT ENOUGH INFO'}

    seed=1234
    np.random.seed(seed)
    rng = np.random.RandomState(seed)    #random seed, control the model generates the same results
    srng = T.shared_randomstreams.RandomStreams(rng.randint(seed))

    "load raw data"
    train_sents, train_sent_masks, train_sent_labels, train_claims, train_claim_mask, train_labels, word2id  = load_fever_train(sent_len, claim_len, cand_size)
    train_3th_sents, train_3th_sent_masks, train_3th_sent_labels, train_3th_claims, train_3th_claim_mask, train_3th_labels, word2id = load_fever_train_NoEnoughInfo(sent_len, claim_len, cand_size, word2id)
    test_sents, test_sent_masks, test_sent_labels, test_claims, test_claim_mask, test_sent_names,test_ground_names,test_labels,word2id = load_fever_dev(sent_len, claim_len, cand_size, word2id)
    test_3th_sents, test_3th_sent_masks, test_3th_sent_labels, test_3th_claims, test_3th_claim_mask, test_3th_labels, word2id = load_fever_dev_NoEnoughInfo(sent_len, claim_len, cand_size, word2id)

    train_sents=np.asarray(train_sents, dtype='int32')
    train_3th_sents=np.asarray(train_3th_sents, dtype='int32')
    joint_train_sents = np.concatenate((train_sents,train_3th_sents))
    test_sents=np.asarray(test_sents, dtype='int32')
    test_3th_sents=np.asarray(test_3th_sents, dtype='int32')
    joint_test_sents = np.concatenate((test_sents,test_3th_sents))

    train_sent_masks=np.asarray(train_sent_masks, dtype=theano.config.floatX)
    train_3th_sent_masks=np.asarray(train_3th_sent_masks, dtype=theano.config.floatX)
    joint_train_sent_masks = np.concatenate((train_sent_masks,train_3th_sent_masks))
    test_sent_masks=np.asarray(test_sent_masks, dtype=theano.config.floatX)
    test_3th_sent_masks=np.asarray(test_3th_sent_masks, dtype=theano.config.floatX)
    joint_test_sent_masks = np.concatenate((test_sent_masks,test_3th_sent_masks))

    train_sent_labels=np.asarray(train_sent_labels, dtype='int32')
    train_3th_sent_labels=np.asarray(train_3th_sent_labels, dtype='int32')
    joint_train_sent_labels = np.concatenate((train_sent_labels,train_3th_sent_labels))
    test_sent_labels=np.asarray(test_sent_labels, dtype='int32')
    test_3th_sent_labels=np.asarray(test_3th_sent_labels, dtype='int32')
    joint_test_sent_labels = np.concatenate((test_sent_labels,test_3th_sent_labels))



    train_claims=np.asarray(train_claims, dtype='int32')
    train_3th_claims=np.asarray(train_3th_claims, dtype='int32')
    joint_train_claims = np.concatenate((train_claims,train_3th_claims))
    test_claims=np.asarray(test_claims, dtype='int32')
    test_3th_claims=np.asarray(test_3th_claims, dtype='int32')
    joint_test_claims = np.concatenate((test_claims,test_3th_claims))

    train_claim_mask=np.asarray(train_claim_mask, dtype=theano.config.floatX)
    train_3th_claim_mask=np.asarray(train_3th_claim_mask, dtype=theano.config.floatX)
    joint_train_claim_mask = np.concatenate((train_claim_mask,train_3th_claim_mask))
    test_claim_mask=np.asarray(test_claim_mask, dtype=theano.config.floatX)
    test_3th_claim_mask=np.asarray(test_3th_claim_mask, dtype=theano.config.floatX)
    joint_test_claim_mask = np.concatenate((test_claim_mask,test_3th_claim_mask))

    train_labels=np.asarray(train_labels, dtype='int32')
    train_3th_labels=np.asarray(train_3th_labels, dtype='int32')
    joint_train_labels = np.concatenate((train_labels,train_3th_labels))
    test_labels=np.asarray(test_labels, dtype='int32')
    test_3th_labels=np.asarray(test_3th_labels, dtype='int32')
    joint_test_labels = np.concatenate((test_labels,test_3th_labels))

    joint_train_size=len(joint_train_claims)
    joint_test_size=len(joint_test_claims)
    train_size=len(train_claims)
    test_size=len(test_claims)
    test_3th_size = len(test_3th_claims)
    vocab_size=len(word2id)+1
    print 'joint_train size: ', joint_train_size, ' joint_test size: ', joint_test_size
    print 'train size: ', train_size, ' test size: ', test_size
    print 'vocab size: ', vocab_size



    rand_values=rng.normal(0.0, 0.01, (vocab_size, emb_size))   #generate a matrix by Gaussian distribution
    id2word = {y:x for x,y in word2id.iteritems()}
    word2vec=load_word2vec()
    rand_values=load_word2vec_to_init(rand_values, id2word, word2vec)
    init_embeddings=theano.shared(value=np.array(rand_values,dtype=theano.config.floatX), borrow=True)   #wrap up the python variable "rand_values" into theano variable


    "now, start to build the input form of the model"
    sents_ids=T.itensor3() #(batch, cand_size, sent_len)
    sents_mask=T.ftensor3()
    sents_labels=T.imatrix() #(batch, cand_size)
    claim_ids = T.imatrix() #(batch, claim_len)
    claim_mask = T.fmatrix()

    joint_sents_ids=T.itensor3() #(batch, cand_size, sent_len)
    joint_sents_mask=T.ftensor3()
    joint_sents_labels=T.imatrix() #(batch, cand_size)
    joint_claim_ids = T.imatrix() #(batch, claim_len)
    joint_claim_mask = T.fmatrix()
    joint_labels=T.ivector()
    ######################
    # BUILD ACTUAL MODEL #
    ######################
    print '... building the model'


    embed_input_sents=init_embeddings[sents_ids.flatten()].reshape((batch_size*cand_size, sent_len, emb_size)).dimshuffle(0,2,1)#embed_input(init_embeddings, sents_ids_l)#embeddings[sents_ids_l.flatten()].reshape((batch_size,maxSentLen, emb_size)).dimshuffle(0,2,1) #the input format can be adapted into CNN or GRU or LSTM
    embed_input_claim=init_embeddings[claim_ids.flatten()].reshape((batch_size,claim_len, emb_size)).dimshuffle(0,2,1)



    conv_W, conv_b=create_conv_para(rng, filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]))
    task1_att_conv_W, task1_att_conv_b=create_conv_para(rng, filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]))
    task1_conv_W_context, task1_conv_b_context=create_conv_para(rng, filter_shape=(hidden_size[0], 1, emb_size, 1))
    att_conv_W, att_conv_b=create_conv_para(rng, filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]))
    conv_W_context, conv_b_context=create_conv_para(rng, filter_shape=(hidden_size[0], 1, emb_size, 1))

    NN_para=[conv_W, conv_b, task1_att_conv_W, task1_att_conv_b, att_conv_W, att_conv_b,task1_conv_W_context,conv_W_context]

    conv_model_sents = Conv_with_Mask(rng, input_tensor3=embed_input_sents,
             mask_matrix = sents_mask.reshape((sents_mask.shape[0]*sents_mask.shape[1],sents_mask.shape[2])),
             image_shape=(batch_size*cand_size, 1, emb_size, sent_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]), W=conv_W, b=conv_b)    #mutiple mask with the conv_out to set the features by UNK to zero
    sent_embeddings=conv_model_sents.maxpool_vec #(batch_size*cand_size, hidden_size) # each sentence then have an embedding of length hidden_size
    batch_sent_emb = sent_embeddings.reshape((batch_size, cand_size, hidden_size[0]))

    conv_model_claims = Conv_with_Mask(rng, input_tensor3=embed_input_claim,
             mask_matrix = claim_mask,
             image_shape=(batch_size, 1, emb_size, claim_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]), W=conv_W, b=conv_b)    #mutiple mask with the conv_out to set the features by UNK to zero
    claim_embeddings=conv_model_claims.maxpool_vec #(batch_size, hidden_size) # each sentence then have an embedding of length hidden_size
    batch_claim_emb = T.repeat(claim_embeddings.dimshuffle(0,'x', 1), cand_size, axis=1)

    '''
    attentive conv for task1
    '''
    task1_attentive_conv_layer = Attentive_Conv_for_Pair_easy_version(rng,
            input_tensor3=embed_input_sents, #batch_size*cand_size, emb_size, sent_len
            input_tensor3_r = T.repeat(embed_input_claim, cand_size, axis=0),
             mask_matrix = sents_mask.reshape((sents_mask.shape[0]*sents_mask.shape[1],sents_mask.shape[2])),
             mask_matrix_r = T.repeat(claim_mask,cand_size, axis=0),
             image_shape=(batch_size*cand_size, 1, emb_size, sent_len),
             image_shape_r = (batch_size*cand_size, 1, emb_size, claim_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]),
             filter_shape_context=(hidden_size[0], 1,emb_size, 1),
             W=task1_att_conv_W, b=task1_att_conv_b,
             W_context=task1_conv_W_context, b_context=task1_conv_b_context)
    task1_attentive_sent_embeddings_l = task1_attentive_conv_layer.attentive_maxpool_vec_l  #(batch_size*cand_size, hidden_size)
    task1_attentive_sent_embeddings_r = task1_attentive_conv_layer.attentive_maxpool_vec_r




    concate_claim_sent = T.concatenate([batch_claim_emb,batch_sent_emb, T.sum(batch_claim_emb*batch_sent_emb, axis=2).dimshuffle(0,1,'x')], axis=2)
    concate_2_matrix = concate_claim_sent.reshape((batch_size*cand_size, hidden_size[0]*2+1))

    LR_input = T.concatenate([concate_2_matrix, task1_attentive_sent_embeddings_l,task1_attentive_sent_embeddings_r], axis=1)
    LR_input_size = hidden_size[0]*2+1 + hidden_size[0]*2

    # LR_input = concate_2_matrix
    # LR_input_size = hidden_size[0]*2+1
    #classification layer, it is just mapping from a feature vector of size "hidden_size" to a vector of only two values: positive, negative
    U_a = create_ensemble_para(rng, 1, LR_input_size) # the weight matrix hidden_size*2
    # LR_b = theano.shared(value=np.zeros((8,),dtype=theano.config.floatX),name='LR_b', borrow=True)  #bias for each target class
    LR_para=[U_a]
    # layer_LR=LogisticRegression(rng, input=LR_input, n_in=LR_input_size, n_out=8, W=U_a, b=LR_b) #basically it is a multiplication between weight matrix and input feature vector
    score_matrix = T.nnet.sigmoid(LR_input.dot(U_a))  #batch * 12
    inter_matrix = score_matrix.reshape((batch_size, cand_size))

    # inter_sent_claim = T.batched_dot(batch_sent_emb, batch_claim_emb) #(batch_size, cand_size, 1)
    # inter_matrix = T.nnet.sigmoid(inter_sent_claim.reshape((batch_size, cand_size)))
    '''
    maybe 1.0-inter_matrix can be rewritten into 1/e^(inter_matrix)
    '''
    # prob_pos = T.where( sents_labels < 1, 1.0-inter_matrix, inter_matrix)
    # loss = -T.mean(T.log(prob_pos))
    #f1 as loss
    batch_overlap = T.sum(sents_labels*inter_matrix, axis=1)
    batch_recall = batch_overlap / T.sum(sents_labels, axis=1)
    batch_precision = batch_overlap / T.sum(inter_matrix, axis=1)
    batch_f1 = 2.0*batch_recall*batch_precision/(batch_recall+batch_precision)
    loss = -T.mean(T.log(batch_f1))
    # loss = T.nnet.nnet.binary_crossentropy(inter_matrix, sents_labels).mean()


    '''
    training task2, predict 3 labels
    '''
    joint_embed_input_sents=init_embeddings[joint_sents_ids.flatten()].reshape((batch_size*cand_size, sent_len, emb_size)).dimshuffle(0,2,1)#embed_input(init_embeddings, sents_ids_l)#embeddings[sents_ids_l.flatten()].reshape((batch_size,maxSentLen, emb_size)).dimshuffle(0,2,1) #the input format can be adapted into CNN or GRU or LSTM
    joint_embed_input_claim=init_embeddings[joint_claim_ids.flatten()].reshape((batch_size,claim_len, emb_size)).dimshuffle(0,2,1)
    joint_conv_model_sents = Conv_with_Mask(rng, input_tensor3=joint_embed_input_sents,
             mask_matrix = joint_sents_mask.reshape((joint_sents_mask.shape[0]*joint_sents_mask.shape[1],joint_sents_mask.shape[2])),
             image_shape=(batch_size*cand_size, 1, emb_size, sent_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]), W=conv_W, b=conv_b)    #mutiple mask with the conv_out to set the features by UNK to zero
    joint_sent_embeddings=joint_conv_model_sents.maxpool_vec #(batch_size*cand_size, hidden_size) # each sentence then have an embedding of length hidden_size
    joint_batch_sent_emb = joint_sent_embeddings.reshape((batch_size, cand_size, hidden_size[0]))
    joint_premise_emb = T.sum(joint_batch_sent_emb*joint_sents_labels.dimshuffle(0,1,'x'), axis=1) #(batch, hidden_size)

    joint_conv_model_claims = Conv_with_Mask(rng, input_tensor3=joint_embed_input_claim,
             mask_matrix = joint_claim_mask,
             image_shape=(batch_size, 1, emb_size, claim_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]), W=conv_W, b=conv_b)    #mutiple mask with the conv_out to set the features by UNK to zero
    joint_claim_embeddings=joint_conv_model_claims.maxpool_vec #(batch_size, hidden_size) # each sentence then have an embedding of length hidden_size

    joint_premise_hypo_emb = T.concatenate([joint_premise_emb,joint_claim_embeddings], axis=1) #(batch, 2*hidden_size)
    '''
    attentive conv in task2
    '''
    joint_sents_tensor3 = joint_embed_input_sents.dimshuffle(0,2,1).reshape((batch_size, cand_size*sent_len, emb_size))
    joint_sents_dot = T.batched_dot(joint_sents_tensor3, joint_sents_tensor3.dimshuffle(0,2,1)) #(batch_size, cand_size*sent_len, cand_size*sent_len)
    joint_sents_dot_2_matrix = T.nnet.softmax(joint_sents_dot.reshape((batch_size*cand_size*sent_len, cand_size*sent_len)))
    joint_sents_context = T.batched_dot(joint_sents_dot_2_matrix.reshape((batch_size, cand_size*sent_len, cand_size*sent_len)), joint_sents_tensor3) #(batch_size, cand_size*sent_len, emb_size)
    joint_add_sents_context = joint_embed_input_sents+joint_sents_context.reshape((batch_size*cand_size, sent_len, emb_size)).dimshuffle(0,2,1)#T.concatenate([joint_embed_input_sents, joint_sents_context.reshape((batch_size*cand_size, sent_len, emb_size)).dimshuffle(0,2,1)], axis=1) #(batch_size*cand_size, 2*emb_size, sent_len)

    attentive_conv_layer = Attentive_Conv_for_Pair_easy_version(rng,
            input_tensor3=joint_add_sents_context, #batch_size*cand_size, 2*emb_size, sent_len
            input_tensor3_r = T.repeat(joint_embed_input_claim, cand_size, axis=0),
             mask_matrix = joint_sents_mask.reshape((joint_sents_mask.shape[0]*joint_sents_mask.shape[1],joint_sents_mask.shape[2])),
             mask_matrix_r = T.repeat(joint_claim_mask,cand_size, axis=0),
             image_shape=(batch_size*cand_size, 1, emb_size, sent_len),
             image_shape_r = (batch_size*cand_size, 1, emb_size, claim_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]),
             filter_shape_context=(hidden_size[0], 1,emb_size, 1),
             W=att_conv_W, b=att_conv_b,
             W_context=conv_W_context, b_context=conv_b_context)
    attentive_sent_embeddings_l = attentive_conv_layer.attentive_maxpool_vec_l.reshape((batch_size, cand_size, hidden_size[0]))  #(batch_size*cand_size, hidden_size)
    attentive_sent_embeddings_r = attentive_conv_layer.attentive_maxpool_vec_r.reshape((batch_size, cand_size, hidden_size[0]))
    masked_sents_attconv = attentive_sent_embeddings_l*joint_sents_labels.dimshuffle(0,1,'x')
    masked_claim_attconv = attentive_sent_embeddings_r*joint_sents_labels.dimshuffle(0,1,'x')
    fine_max = T.concatenate([T.max(masked_sents_attconv, axis=1),T.max(masked_claim_attconv, axis=1)],axis=1) #(batch, 2*hidden)
    # fine_sum = T.concatenate([T.sum(masked_sents_attconv, axis=1),T.sum(masked_claim_attconv, axis=1)],axis=1) #(batch, 2*hidden)
    "Logistic Regression layer"
    joint_LR_input = T.concatenate([joint_premise_hypo_emb,fine_max], axis=1)
    joint_LR_input_size=2*hidden_size[0]+2*hidden_size[0]

    joint_U_a = create_ensemble_para(rng, 3, joint_LR_input_size) # (input_size, 3)
    joint_LR_b = theano.shared(value=np.zeros((3,),dtype=theano.config.floatX),name='LR_b', borrow=True)  #bias for each target class
    joint_LR_para=[joint_U_a, joint_LR_b]

    joint_layer_LR=LogisticRegression(rng, input=joint_LR_input, n_in=joint_LR_input_size, n_out=3, W=joint_U_a, b=joint_LR_b) #basically it is a multiplication between weight matrix and input feature vector
    joint_loss=joint_layer_LR.negative_log_likelihood(joint_labels)  #for classification task, we usually used negative log likelihood as loss, the lower the better.







    '''
    testing
    '''
    # binarize_prob = T.where( inter_matrix > 0.5, 1, 0)  #(batch_size, cand_size

    masked_inter_matrix = inter_matrix * sents_labels #(batch, cand_size)
    test_premise_emb = T.sum(batch_sent_emb*masked_inter_matrix.dimshuffle(0,1,'x'), axis=1)
    test_premise_hypo_emb = T.concatenate([test_premise_emb,claim_embeddings], axis=1)

    #fine-maxsum
    sents_tensor3 = embed_input_sents.dimshuffle(0,2,1).reshape((batch_size, cand_size*sent_len, emb_size))
    sents_dot = T.batched_dot(sents_tensor3, sents_tensor3.dimshuffle(0,2,1)) #(batch_size, cand_size*sent_len, cand_size*sent_len)
    sents_dot_2_matrix = T.nnet.softmax(sents_dot.reshape((batch_size*cand_size*sent_len, cand_size*sent_len)))
    sents_context = T.batched_dot(sents_dot_2_matrix.reshape((batch_size, cand_size*sent_len, cand_size*sent_len)), sents_tensor3) #(batch_size, cand_size*sent_len, emb_size)
    add_sents_context = embed_input_sents+sents_context.reshape((batch_size*cand_size, sent_len, emb_size)).dimshuffle(0,2,1)#T.concatenate([embed_input_sents, sents_context.reshape((batch_size*cand_size, sent_len, emb_size)).dimshuffle(0,2,1)], axis=1) #(batch_size*cand_size, 2*emb_size, sent_len)

    test_attentive_conv_layer = Attentive_Conv_for_Pair_easy_version(rng,
            input_tensor3=add_sents_context, #batch_size*cand_size, 2*emb_size, sent_len
            input_tensor3_r = T.repeat(embed_input_claim, cand_size, axis=0),
             mask_matrix = sents_mask.reshape((sents_mask.shape[0]*sents_mask.shape[1],sents_mask.shape[2])),
             mask_matrix_r = T.repeat(claim_mask,cand_size, axis=0),
             image_shape=(batch_size*cand_size, 1, emb_size, sent_len),
             image_shape_r = (batch_size*cand_size, 1, emb_size, claim_len),
             filter_shape=(hidden_size[0], 1, emb_size, filter_size[0]),
             filter_shape_context=(hidden_size[0], 1,emb_size, 1),
             W=att_conv_W, b=att_conv_b,
             W_context=conv_W_context, b_context=conv_b_context)
    # attentive_sent_embeddings_l = attentive_conv_layer.attentive_maxpool_vec_l  #(batch_size*cand_size, hidden_size)
    # attentive_sent_embeddings_r = attentive_conv_layer.attentive_maxpool_vec_r

    test_attentive_sent_embeddings_l = test_attentive_conv_layer.attentive_maxpool_vec_l.reshape((batch_size, cand_size, hidden_size[0]))  #(batch_size*cand_size, hidden_size)
    test_attentive_sent_embeddings_r = test_attentive_conv_layer.attentive_maxpool_vec_r.reshape((batch_size, cand_size, hidden_size[0]))
    test_masked_sents_attconv = test_attentive_sent_embeddings_l*masked_inter_matrix.dimshuffle(0,1,'x')
    test_masked_claim_attconv = test_attentive_sent_embeddings_r*masked_inter_matrix.dimshuffle(0,1,'x')
    test_fine_max = T.concatenate([T.max(test_masked_sents_attconv, axis=1),T.max(test_masked_claim_attconv, axis=1)],axis=1) #(batch, 2*hidden)
    # test_fine_sum = T.concatenate([T.sum(test_masked_sents_attconv, axis=1),T.sum(test_masked_claim_attconv, axis=1)],axis=1) #(batch, 2*hidden)


    test_LR_input = T.concatenate([test_premise_hypo_emb, test_fine_max], axis=1)
    test_LR_input_size = joint_LR_input_size

    test_layer_LR=LogisticRegression(rng, input=test_LR_input, n_in=test_LR_input_size, n_out=3, W=joint_U_a, b=joint_LR_b) #basically it is a multiplication between weight matrix and input feature vector



    params = [init_embeddings]+NN_para+LR_para + joint_LR_para
    cost=loss+joint_loss
    "Use AdaGrad to update parameters"
    updates =   Gradient_Cost_Para(cost,params, learning_rate)

    train_model = theano.function([sents_ids,sents_mask,sents_labels,claim_ids,claim_mask,joint_sents_ids,joint_sents_mask,joint_sents_labels, joint_claim_ids, joint_claim_mask, joint_labels], cost, updates=updates, allow_input_downcast=True, on_unused_input='ignore')
    # dev_model = theano.function([sents_ids_l, sents_mask_l, sents_ids_r, sents_mask_r, labels], layer_LR.errors(labels), allow_input_downcast=True, on_unused_input='ignore')
    test_model = theano.function([sents_ids,sents_mask,sents_labels, claim_ids,claim_mask, joint_labels], [inter_matrix,test_layer_LR.errors(joint_labels), test_layer_LR.y_pred], allow_input_downcast=True, on_unused_input='ignore')

    ###############
    # TRAIN MODEL #
    ###############
    print '... training'
    # early-stopping parameters
    patience = 50000000000  # look as this many examples regardless
    start_time = time.time()
    mid_time = start_time
    past_time= mid_time
    epoch = 0
    done_looping = False

    joint_n_train_batches=joint_train_size/batch_size
    joint_train_batch_start=list(np.arange(joint_n_train_batches)*batch_size)+[joint_train_size-batch_size]
    n_train_batches=train_size/batch_size
    train_batch_start=list(np.arange(n_train_batches)*batch_size)+[train_size-batch_size]

    n_test_batches=test_size/batch_size
    test_batch_start=list(np.arange(n_test_batches)*batch_size)+[test_size-batch_size]
    n_test_3th_batches=test_3th_size/batch_size
    test_3th_batch_start=list(np.arange(n_test_3th_batches)*batch_size)+[test_3th_size-batch_size]

    max_acc=0.0
    max_test_f1=0.0
    max_acc_full_evi = 0.0

    cost_i=0.0
    joint_train_indices = range(joint_train_size)
    train_indices = range(train_size)

    while epoch < n_epochs:
        epoch = epoch + 1

        random.Random(100).shuffle(joint_train_indices) #shuffle training set for each new epoch, is supposed to promote performance, but not garrenteed
        random.Random(100).shuffle(train_indices)
        iter_accu=0

        for joint_batch_id in joint_train_batch_start: #for each batch
            # iter means how many batches have been run, taking into loop
            iter = (epoch - 1) * joint_n_train_batches + iter_accu +1
            iter_accu+=1
            joint_train_id_batch = joint_train_indices[joint_batch_id:joint_batch_id+batch_size]
            for i in range(3):
                batch_id = random.choice(train_batch_start)
                train_id_batch = train_indices[batch_id:batch_id+batch_size]
                cost_i+= train_model(
                                    train_sents[train_id_batch],
                                    train_sent_masks[train_id_batch],
                                    train_sent_labels[train_id_batch],
                                    train_claims[train_id_batch],
                                    train_claim_mask[train_id_batch],
                                    #joint_sents_ids,joint_sents_mask,joint_sents_labels, joint_claim_ids, joint_claim_mask, joint_labels
                                    joint_train_sents[joint_train_id_batch],
                                    joint_train_sent_masks[joint_train_id_batch],
                                    joint_train_sent_labels[joint_train_id_batch],
                                    joint_train_claims[joint_train_id_batch],
                                    joint_train_claim_mask[joint_train_id_batch],
                                    joint_train_labels[joint_train_id_batch]
                                    )

            #after each 1000 batches, we test the performance of the model on all test data
            # if (epoch==1 and iter%1000==0) or (epoch>=2 and iter%5==0):
            if iter%100==0:
                print 'Epoch ', epoch, 'iter '+str(iter)+' average cost: '+str(cost_i/iter), 'uses ', (time.time()-past_time)/60.0, 'min'
                past_time = time.time()

                f1_sum=0.0
                error_sum = 0.0
                full_evi = 0
                predictions = []
                for test_batch_id in test_batch_start: # for each test batch
                    batch_prob, error_i, pred_i=test_model(
                            test_sents[test_batch_id:test_batch_id+batch_size],
                            test_sent_masks[test_batch_id:test_batch_id+batch_size],
                            test_sent_labels[test_batch_id:test_batch_id+batch_size],
                            test_claims[test_batch_id:test_batch_id+batch_size],
                            test_claim_mask[test_batch_id:test_batch_id+batch_size],
                            test_labels[test_batch_id:test_batch_id+batch_size]
                            )
                    error_sum+=error_i
                    batch_sent_labels = test_sent_labels[test_batch_id:test_batch_id+batch_size]
                    batch_sent_names = test_sent_names[test_batch_id:test_batch_id+batch_size]
                    batch_ground_names = test_ground_names[test_batch_id:test_batch_id+batch_size]
                    batch_ground_labels = test_labels[test_batch_id:test_batch_id+batch_size]
                    for i in range(batch_size):
                        instance_i = {}
                        instance_i['label'] = pred_id2label.get(batch_ground_labels[i])
                        instance_i['predicted_label'] = pred_id2label.get(pred_i[i])
                        pred_sent_names = []
                        gold_sent_names = batch_ground_names[i]
                        zipped=[(batch_prob[i,k],batch_sent_labels[i][k],batch_sent_names[i][k]) for k in range(cand_size)]
                        sorted_zip = sorted(zipped, key=lambda x: x[0], reverse=True)
                        for j in range(cand_size):
                            triple = sorted_zip[j]
                            if triple[1] == 1.0:
                                '''
                                we should consider a rank, instead of binary
                                if triple[0] >0.5: can control the recall, influence the strict_acc
                                '''
                                if triple[0] >0.5:
                                    # pred_sent_names.append(batch_sent_names[i][j])
                                    pred_sent_names.append(triple[2])
                                # if len(pred_sent_names) == max_pred_pick:
                                #     break
                        instance_i['predicted_evidence'] = pred_sent_names
                        # print 'pred_sent_names:',pred_sent_names
                        # print 'gold_sent_names:',gold_sent_names
                        new_gold_names = []
                        for gold_name in gold_sent_names:
                            new_gold_names.append([None, None]+gold_name)
                        instance_i['evidence'] = [new_gold_names]
                        predictions.append(instance_i)
                strict_score, label_accuracy, precision, recall, f1 = fever_score(predictions)
                print 'strict_score, label_accuracy, precision, recall, f1: ', strict_score, label_accuracy, precision, recall, f1
                # test_f1=f1_sum/(len(test_batch_start)*batch_size)

                for test_batch_id in test_3th_batch_start: # for each test batch
                    _, error_i, pred_i=test_model(
                            test_3th_sents[test_batch_id:test_batch_id+batch_size],
                            test_3th_sent_masks[test_batch_id:test_batch_id+batch_size],
                            test_3th_sent_labels[test_batch_id:test_batch_id+batch_size],
                            test_3th_claims[test_batch_id:test_batch_id+batch_size],
                            test_3th_claim_mask[test_batch_id:test_batch_id+batch_size],
                            test_3th_labels[test_batch_id:test_batch_id+batch_size]
                            )
                    for i in range(batch_size):
                        instance_i = {}
                        instance_i['label'] = pred_id2label.get(2)
                        instance_i['predicted_label'] = pred_id2label.get(pred_i[i])
                        instance_i['predicted_evidence'] = []
                        instance_i['evidence'] = []
                        predictions.append(instance_i)

                strict_score, label_accuracy, precision, recall, f1 = fever_score(predictions)
                print 'strict_score, label_accuracy, precision, recall, f1: ', strict_score, label_accuracy, precision, recall, f1

        print 'Epoch ', epoch, 'uses ', (time.time()-mid_time)/60.0, 'min'
        mid_time = time.time()

        #print 'Batch_size: ', update_freq
    end_time = time.time()

    print >> sys.stderr, ('The code for file ' +
                          os.path.split(__file__)[1] +
                          ' ran for %.2fm' % ((end_time - start_time) / 60.))

    return max_acc_test



if __name__ == '__main__':
    evaluate_lenet5()