Assertion: falcon's feather | /r/HasProperty | black
Facets:
Source sentences:
text: The primary feathers of the wing are black and a single black band at the tip of the tail are distinctive.
text: It has black feathers on its head, sort of in the pattern of a helmet, with dark feathers around its beak that look kind of like a dark mustache (remember "mutton chops" in the 1970s?)