Assertion: raven's toy | /r/HasProperty | rare animal behavior
Facets:
Source sentences:
text: Ravens even make toys—a rare animal behavior—by using sticks, pinecones, golf balls, or rocks to play with each other or by themselves.
text: Ravens also make toys, a rare animal treat by using sticks, pinecones, golf balls or rocks to play with each other or with themselves.
text: Ravens even make toys—a rare animal behavior—by using sticks, pinecones, golf balls, or rocks to play with each other or by themselves.
text: Ravens even make toys—a rare animal behavior—by using sticks, pinecones, golf balls, or rocks to play with each other or by themselves.