facebook comment in polls

Hello everyone, 

I would like, if possible, replace the comments on the site, for facebook comments in polls. 

What is the procedure?
Thank you

 RE

 You could do that on the poll page in Pages builder.

Do you know how to add a block to the page?

Yes I know how to do, I put my code on the facebook page but I wish that every poll has his comments. 

While there I have the same comments for all polls