Assertion: crow's feather | /r/HasProperty | smooth
Facets:
Source sentences:
text: Common ravens have a well-developed ruff of feathers on the throat, which are called 'hackles' while the feathers on the throat of a crow are smooth.
text: The feathers around their neck are smooth.
text: The feathers around their neck are smooth.
text: Feathers on the throat are short and smooth.