So to put it into a short message how to

Seems like something that an agent could accomplish?

Otherwise, you could have nested query engines. We support this thing called an IndexNode that can be used for recursive retrieval

https://gpt-index.readthedocs.io/en/stable/examples/query_engine/pdf_tables/recursive_retriever.html

thanks for the advice, I'll test it out, though agents won't probably work with open LLMs

ha that is very true. The recursive query may work well then 👀