Assertion: anhinga's feather | /r/HasProperty | described
Facets:
Source sentences:
text: The back of the head and the neck have elongated feathers that have been described as gray or light purple-white.
text: The back of the head and the neck have elongated feathers that have been described as gray or light purple white.
text: The back of the head and the neck have elongated feathers that have been described as gray or light purple-white.