specify model

docs/vignette-kg.md

@@ -42,7 +42,9 @@ In BioChatter Next, we first activate the KG functionality by clicking on the
 KG functionality and select how many results we want to retrieve. Returning to
 the conversation and enabling the KG functionality for the current chat
 (directly above the send button), we can then ask the model about the KG. The
-conversation is pasted below for convenience.
+languange model we use is, as in the previous RAG vignette, gpt-3.5-turbo. The
+conversation is pasted below for convenience, including the queries generated by
+BioChatter.
 
 ![KG Demo](kg-demo.gif)