diff --git a/nemo_curator/classifiers/aegis.py b/nemo_curator/classifiers/aegis.py
index 1306903f..497fde57 100644
--- a/nemo_curator/classifiers/aegis.py
+++ b/nemo_curator/classifiers/aegis.py
@@ -94,7 +94,7 @@ def forward(self, batch):
 
 
 class AegisHFModel(HFModel):
-    def __init__(self, config: AegisConfig, max_mem_gb=None):
+    def __init__(self, config: AegisConfig, max_mem_gb: Optional[int] = None):
         self.config = config
         if max_mem_gb is None:
             max_mem_gb = _get_suggest_memory_for_classifier()
@@ -109,7 +109,7 @@ def __init__(self, config: AegisConfig, max_mem_gb=None):
             seq_len_increment=1024,
         )
 
-    def load_model(self, device="cuda"):
+    def load_model(self, device: str = "cuda"):
         model = AegisModel(
             self.config.pretrained_model_name_or_path,
             self.config.peft_model_name_or_path,
@@ -171,7 +171,7 @@ def __init__(
         keep_raw_pred: bool = False,
         max_chars: int = 6000,
         device_type: str = "cuda",
-        max_mem_gb: int = None,
+        max_mem_gb: Optional[int] = None,
     ):
         """
         Constructs the classifier
@@ -270,7 +270,7 @@ def _postprocess_responses(self, df):
         df[self.pred_column] = cudf.Series(parsed_response)
         return df
 
-    def _run_classifier(self, dataset: DocumentDataset):
+    def _run_classifier(self, dataset: DocumentDataset) -> DocumentDataset:
         print("Starting AEGIS classifier inference", flush=True)
         ddf = dataset.df
         hidden_meta = ddf._meta.copy()
diff --git a/nemo_curator/classifiers/base.py b/nemo_curator/classifiers/base.py
index 452bb9bb..38c4ae48 100644
--- a/nemo_curator/classifiers/base.py
+++ b/nemo_curator/classifiers/base.py
@@ -16,7 +16,7 @@
 
 os.environ["RAPIDS_NO_INITIALIZE"] = "1"
 from abc import ABC, abstractmethod
-from typing import List
+from typing import List, Optional
 
 import torch
 import torch.nn as nn
@@ -33,15 +33,15 @@ class DistributedDataClassifier(ABC):
 
     def __init__(
         self,
-        model,
-        labels,
-        filter_by,
-        batch_size,
-        out_dim,
-        pred_column,
-        max_chars,
-        device_type,
-        autocast,
+        model: str,
+        labels: List[str],
+        filter_by: Optional[List[str]],
+        batch_size: int,
+        out_dim: int,
+        pred_column: str,
+        max_chars: int,
+        device_type: str,
+        autocast: bool,
     ):
         self.model = model
         self.labels = labels
@@ -53,7 +53,7 @@ def __init__(
         self.device_type = device_type
         self.autocast = autocast
 
-    def __call__(self, dataset: DocumentDataset):
+    def __call__(self, dataset: DocumentDataset) -> DocumentDataset:
         result_doc_dataset = self._run_classifier(dataset)
         if self.filter_by is not None:
             return self._filter_documents(result_doc_dataset)
@@ -61,13 +61,13 @@ def __call__(self, dataset: DocumentDataset):
         return result_doc_dataset
 
     @abstractmethod
-    def _run_classifier(self):
+    def _run_classifier(self) -> DocumentDataset:
         pass
 
     def _filter_documents(
         self,
         dataset: DocumentDataset,
-    ):
+    ) -> DocumentDataset:
         df = dataset.df
 
         filter_by = self.filter_by
@@ -106,7 +106,7 @@ def forward(self, batch):
         else:
             return self._forward(batch)
 
-    def set_autocast(self, autocast):
+    def set_autocast(self, autocast: bool):
         self.autocast = autocast
 
 
@@ -117,6 +117,7 @@ def _run_classifier_helper(
     max_chars: int,
     batch_size: int,
     label_col: str,
+    text_field: str = "text",
     prob_col: str = None,
 ) -> "dask_cudf.DataFrame":
 
@@ -124,7 +125,7 @@ def _run_classifier_helper(
     prob_internal_col = "_prob"
     # TODO: Make crossfit handle this cleanly
     pred_internal_col = "labels"
-    df["sliced_text"] = df["text"].str.slice(0, max_chars)
+    df["sliced_text"] = df[text_field].str.slice(0, max_chars)
     columns_to_keep_list = df.columns.to_list()
     columns_to_keep_list.remove("sliced_text")
 
diff --git a/nemo_curator/classifiers/domain.py b/nemo_curator/classifiers/domain.py
index f77bade7..843b35a2 100644
--- a/nemo_curator/classifiers/domain.py
+++ b/nemo_curator/classifiers/domain.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 import os
 from dataclasses import dataclass
+from typing import List, Optional
 
 os.environ["RAPIDS_NO_INITIALIZE"] = "1"
 from crossfit.backend.torch.hf.model import HFModel
@@ -31,14 +32,17 @@
 
 @dataclass
 class DomainModelConfig:
-    model = "microsoft/deberta-v3-base"
-    fc_dropout = 0.2
-    max_len = 512
+    model: str = "microsoft/deberta-v3-base"
+    fc_dropout: float = 0.2
+    max_len: int = 512
 
 
 class DomainModel(HFModel):
     def __init__(
-        self, config: DomainModelConfig, autocast: bool = False, max_mem_gb=None
+        self,
+        config: DomainModelConfig,
+        autocast: bool = False,
+        max_mem_gb: Optional[int] = None,
     ):
         self.config = config
         self.autocast = autocast
@@ -47,7 +51,7 @@ def __init__(
 
         super().__init__(self.config.model, max_mem_gb=max_mem_gb)
 
-    def load_model(self, device="cuda"):
+    def load_model(self, device: str = "cuda"):
         model = HFDeberta.from_pretrained(DOMAIN_IDENTIFIER)
         model.set_autocast(self.autocast)
         model = model.to(device)
@@ -70,6 +74,7 @@ class DomainClassifier(DistributedDataClassifier):
         filter_by (list[str], optional): The classes to filter the dataset by.
                                          If None, all classes will be included. Defaults to None.
         batch_size (int): The number of samples per batch for inference. Defaults to 256.
+        text_field (str): The field in the dataset that should be classified.
         pred_column (str): The column name where predictions will be stored. Defaults to "domain_pred".
         prob_column (str, optional): The column name where prediction probabilities will be stored. Defaults to None.
         max_chars (int): The maximum number of characters in each document to consider for classification. Defaults to 2000.
@@ -82,17 +87,19 @@ class DomainClassifier(DistributedDataClassifier):
 
     def __init__(
         self,
-        filter_by=None,
-        batch_size=256,
-        pred_column="domain_pred",
-        prob_column=None,
-        max_chars=2000,
-        device_type="cuda",
-        autocast=True,
-        max_mem_gb=None,
+        filter_by: Optional[List[str]] = None,
+        batch_size: int = 256,
+        text_field: str = "text",
+        pred_column: str = "domain_pred",
+        prob_column: Optional[str] = None,
+        max_chars: int = 2000,
+        device_type: str = "cuda",
+        autocast: bool = True,
+        max_mem_gb: Optional[int] = None,
     ):
         config = AutoConfig.from_pretrained(DOMAIN_IDENTIFIER)
 
+        self.text_field = text_field
         self.prob_column = prob_column
         self.labels = list(config.label2id.keys())
         self.labels.sort(key=lambda x: config.label2id[x])
@@ -114,7 +121,7 @@ def __init__(
             autocast=autocast,
         )
 
-    def _run_classifier(self, dataset: DocumentDataset):
+    def _run_classifier(self, dataset: DocumentDataset) -> DocumentDataset:
         print("Starting domain classifier inference", flush=True)
         df = dataset.df
         df = _run_classifier_helper(
@@ -124,6 +131,7 @@ def _run_classifier(self, dataset: DocumentDataset):
             max_chars=self.max_chars,
             batch_size=self.batch_size,
             label_col=self.pred_column,
+            text_field=self.text_field,
             prob_col=self.prob_column,
         )
         return DocumentDataset(df)
diff --git a/nemo_curator/classifiers/fineweb_edu.py b/nemo_curator/classifiers/fineweb_edu.py
index 9547fc8f..75050b22 100644
--- a/nemo_curator/classifiers/fineweb_edu.py
+++ b/nemo_curator/classifiers/fineweb_edu.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import os
+from typing import Optional
 
 os.environ["RAPIDS_NO_INITIALIZE"] = "1"
 import torch
@@ -29,21 +30,26 @@
 
 
 class FinewebEduModel(HFModel):
-    def __init__(self, path_or_name, max_mem_gb=None, autocast=False):
+    def __init__(
+        self,
+        path_or_name: str,
+        max_mem_gb: Optional[int] = None,
+        autocast: bool = False,
+    ):
         self.path_or_name = path_or_name
         self.autocast = autocast
         if max_mem_gb is None:
             max_mem_gb = _get_suggest_memory_for_classifier()
         super().__init__(path_or_name=path_or_name, max_mem_gb=max_mem_gb)
 
-    def load_model(self, device="cuda"):
+    def load_model(self, device: str = "cuda"):
         model = AutoModelForSequenceClassification.from_pretrained(self.path_or_name)
         model = model.to(device)
         model = self.configure_forward(model, self.autocast)
         return model
 
     @staticmethod
-    def configure_forward(model, autocast=True):
+    def configure_forward(model, autocast: bool = True):
         original_forward = model.forward
 
         def custom_forward(*args, **kwargs):
@@ -83,14 +89,14 @@ class FineWebEduClassifier(DistributedDataClassifier):
 
     def __init__(
         self,
-        batch_size=256,
+        batch_size: int = 256,
         text_field: str = "text",
-        pred_column="fineweb-edu-score",
+        pred_column: str = "fineweb-edu-score",
         int_column="fineweb-edu-score-int",
-        max_chars=-1,
-        device_type="cuda",
-        autocast=True,
-        max_mem_gb=None,
+        max_chars: int = -1,
+        device_type: str = "cuda",
+        autocast: bool = True,
+        max_mem_gb: Optional[int] = None,
     ):
         model = FinewebEduModel(
             path_or_name=FINEWEB_EDU_IDENTIFIER,
@@ -112,7 +118,7 @@ def __init__(
             out_dim=1,
         )
 
-    def _run_classifier(self, dataset: DocumentDataset):
+    def _run_classifier(self, dataset: DocumentDataset) -> DocumentDataset:
         print("Starting Fineweb EDU classifier inference", flush=True)
         ddf = dataset.df
 
diff --git a/nemo_curator/classifiers/quality.py b/nemo_curator/classifiers/quality.py
index c0f2bf77..90db1de5 100644
--- a/nemo_curator/classifiers/quality.py
+++ b/nemo_curator/classifiers/quality.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 import os
 from dataclasses import dataclass
+from typing import List, Optional
 
 os.environ["RAPIDS_NO_INITIALIZE"] = "1"
 from crossfit.backend.torch.hf.model import HFModel
@@ -31,14 +32,17 @@
 
 @dataclass
 class QualityModelConfig:
-    model = "microsoft/deberta-v3-base"
-    fc_dropout = 0.2
-    max_len = 1024
+    model: str = "microsoft/deberta-v3-base"
+    fc_dropout: float = 0.2
+    max_len: int = 1024
 
 
 class QualityModel(HFModel):
     def __init__(
-        self, config: QualityModelConfig, autocast: bool = False, max_mem_gb: int = None
+        self,
+        config: QualityModelConfig,
+        autocast: bool = False,
+        max_mem_gb: Optional[int] = None,
     ):
         self.config = config
         self.autocast = autocast
@@ -46,7 +50,7 @@ def __init__(
             max_mem_gb = _get_suggest_memory_for_classifier()
         super().__init__(self.config.model, max_mem_gb=max_mem_gb)
 
-    def load_model(self, device="cuda"):
+    def load_model(self, device: str = "cuda"):
         model = HFDeberta.from_pretrained(QUALITY_IDENTIFIER)
         model.set_autocast(self.autocast)
         model = model.to(device)
@@ -68,6 +72,7 @@ class QualityClassifier(DistributedDataClassifier):
     Attributes:
         filter_by (list[str], optional): The classes to filter the dataset by. If None, all classes will be included. Defaults to None.
         batch_size (int): The number of samples per batch for inference. Defaults to 256.
+        text_field (str): The field in the dataset that should be classified.
         pred_column (str): The column name where predictions will be stored. Defaults to "quality_pred".
         prob_column (str): The column name where prediction probabilities will be stored. Defaults to "quality_prob".
         max_chars (int): The maximum number of characters in each document to consider for classification. Defaults to 6000.
@@ -79,17 +84,19 @@ class QualityClassifier(DistributedDataClassifier):
 
     def __init__(
         self,
-        filter_by=None,
-        batch_size=256,
-        pred_column="quality_pred",
-        prob_column="quality_prob",
-        max_chars=6000,
-        device_type="cuda",
-        autocast=True,
-        max_mem_gb=None,
+        filter_by: Optional[List[str]] = None,
+        batch_size: int = 256,
+        text_field: str = "text",
+        pred_column: str = "quality_pred",
+        prob_column: str = "quality_prob",
+        max_chars: int = 6000,
+        device_type: str = "cuda",
+        autocast: bool = True,
+        max_mem_gb: Optional[int] = None,
     ):
         config = AutoConfig.from_pretrained(QUALITY_IDENTIFIER)
 
+        self.text_field = text_field
         self.prob_column = prob_column
         self.labels = list(config.label2id.keys())
         self.labels.sort(key=lambda x: config.label2id[x])
@@ -111,7 +118,7 @@ def __init__(
             autocast=autocast,
         )
 
-    def _run_classifier(self, dataset: DocumentDataset):
+    def _run_classifier(self, dataset: DocumentDataset) -> DocumentDataset:
         print("Starting Quality classifier inference", flush=True)
         df = dataset.df
         df = _run_classifier_helper(
@@ -121,6 +128,7 @@ def _run_classifier(self, dataset: DocumentDataset):
             max_chars=self.max_chars,
             batch_size=self.batch_size,
             label_col=self.pred_column,
+            text_field=self.text_field,
             prob_col=self.prob_column,
         )
         return DocumentDataset(df)
diff --git a/nemo_curator/scripts/classifiers/aegis_classifier_inference.py b/nemo_curator/scripts/classifiers/aegis_classifier_inference.py
index 308dd534..ba8b8391 100644
--- a/nemo_curator/scripts/classifiers/aegis_classifier_inference.py
+++ b/nemo_curator/scripts/classifiers/aegis_classifier_inference.py
@@ -62,6 +62,7 @@ def main():
     aegis_classifier = AegisClassifier(
         aegis_variant=args.aegis_variant,
         token=args.token,
+        text_field=args.input_text_field,
         max_chars=args.max_chars,
         batch_size=args.batch_size,
         max_mem_gb=args.max_mem_gb_classifier,
diff --git a/nemo_curator/scripts/classifiers/domain_classifier_inference.py b/nemo_curator/scripts/classifiers/domain_classifier_inference.py
index 882e2c8b..8557ecf9 100644
--- a/nemo_curator/scripts/classifiers/domain_classifier_inference.py
+++ b/nemo_curator/scripts/classifiers/domain_classifier_inference.py
@@ -59,6 +59,7 @@ def main():
         add_filename = True
 
     domain_classifier = DomainClassifier(
+        text_field=args.input_text_field,
         max_chars=args.max_chars,
         batch_size=args.batch_size,
         autocast=args.autocast,
diff --git a/nemo_curator/scripts/classifiers/fineweb_edu_classifier_inference.py b/nemo_curator/scripts/classifiers/fineweb_edu_classifier_inference.py
index 3e704848..8552215d 100644
--- a/nemo_curator/scripts/classifiers/fineweb_edu_classifier_inference.py
+++ b/nemo_curator/scripts/classifiers/fineweb_edu_classifier_inference.py
@@ -60,6 +60,7 @@ def main():
         add_filename = True
 
     fineweb_edu_classifier = FineWebEduClassifier(
+        text_field=args.input_text_field,
         batch_size=args.batch_size,
         autocast=args.autocast,
         max_chars=args.max_chars,
diff --git a/nemo_curator/scripts/classifiers/quality_classifier_inference.py b/nemo_curator/scripts/classifiers/quality_classifier_inference.py
index 8fc1717a..2606898f 100644
--- a/nemo_curator/scripts/classifiers/quality_classifier_inference.py
+++ b/nemo_curator/scripts/classifiers/quality_classifier_inference.py
@@ -60,6 +60,7 @@ def main():
         add_filename = True
 
     classifier = QualityClassifier(
+        text_field=args.input_text_field,
         max_chars=args.max_chars,
         batch_size=args.batch_size,
         autocast=args.autocast,