The cloze shortanswer is a naive but good enough example.
The dog smelled a smelly thing.
Smelly things:
- A cat.
- A dog.
- A car.
The dog smelled a {1:SHORTANSWER:%100%cat#~%100%dog#~%100%car#}.
More sophisticated examples have probably not been released to the public domain yet but undoubtedbly in use.