How to know with which dataset an annotator is queried?

Hi,

I'm working on a new version of my annotator, ADEL, and I'm checking how to properly integrate it in GERBIL. Currently, my annotator can be adapted to different vocabularies of entity types, KBs and languages. So in order to use the proper KB, entity types and language I need to know either these three information or with which dataset the annotator is queried.

How can I get this information from a Document?

Thanks in advance :)