For NLU training, is there any way to identify “undefined entity”? For example, in nlu.md an intent is defined such as
## intent: Inquery_Details
- What’s the exact [foobar](detail)
For an input sentence like: “What’s the exact address”
Is there a way for Rasa to not only identify it as the Inquery_Detail intent, but also recognize “address” as a detail entity? I am trying to put a “variable” in the training sentence and extract entities that may not have been defined in the training file.