I have been experimenting with the Semantic search with FAISS method in Chapter 5. I divided a document into sentences and used Semantic Search to answer questions. Often the answers were very good but not up to human standards. I went through the document and made sure each sentence was “stand alone” and did not require context for understanding, for example replacing pronouns with the proper nouns. The results were much better 100% of my test questions were accurately answered. So my suggestion is to prepare documents used for semantic search if at all practical.