Queries to create output based only on a specific source

The ability to link to a Word document, PDF, web page or some specific source as a content source.

Then create an input to write summaries for a specific topic from only that content source (not from everywhere else).

For example, if I have a Google Doc E-book which has 500 or so pages about healing and health which contains references throughout the document to bacteria, I would like to enter an input such as "write paragraphs describing the role bacteria plays in health and healing from this source" (not from other sources) and for Content.ai to create the requested paragraphs summarising all the references to bacteria in only that document.