Neo4j example with annotation Tool

[vga91]

Neo4j example with Neo4jEmbeddingStoreIngestor and RetrievalQAChain to demonstrate that they can be used via @Tool annotation to improve the result.

In this case, "Ingest from document 'miles-of-smiles-terms-of-use.txt', and then return the answer for the question 'What is the cancellation policy?' calls 2 @Tools, 1 for ingest the document and one for answer the question via RetrievalQAChain