How to retrieve MetaData with Answer

[vairaselvam]

Hi Team,
I have created attached metadata with documents (such as Page number, year, persona, etc).

  I am using RetrievalQA chain for answering. My need is :

 1. How to retrieve the metadata of document that holds the answer while answering from query ?  
 2. Do I need to use any other chain to retrieve the metadata (atleast the source and page in the metadata) ?

Thanks,
R.Vaira Selvam.