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README.md

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 - Upload a scientific article as PDF document. You will see a spinner or loading indicator while the processing is in progress. 
 - Once the spinner stops, you can proceed to ask your questions
 
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 ### Query mode (LLm vs Embeddings)
 By default, the mode is set to LLM (Language Model) which enables question/answering. You can directly ask questions related to the document content, and the system will answer the question using content from the document.
 If you switch the mode to "Embedding," the system will return specific chunks from the document that are semantically related to your query. This mode helps to test why sometimes the answers are not satisfying or incomplete.