Assertion: cockatoo's feather | /r/HasProperty | black
Facets:
Source sentences:
text: The feathers on the back and inner wings are black with narrow green margins at their tips, and the outer wing feathers are blue and green.
text: The feathers of the back and shoulders are black, and have yellowish or greenish margins giving rise to a scalloped appearance that varies slightly between three subspecies and the sexes.
text: The palm cockatoo has black feathers over most of its body, a large feather crest on top of its head, and a red patch of skin under the eye.