Talking to a huge product catalog in plain English using LLMs

At Fetch, we have a product catalog consisting of millions of products, in extremely granular levels of detail (even more specific than UPCs are!). It can be difficult to easily get summary stats about those products because of the hierarchical structure of the product categories, so I built a knowledge graph on top of the catalog. The cherry on top is a LangChain-driven interface to ask questions like “how many brands do we have in the Red Wine category?” or “what offers are we running right now for snack products?”