Assertion: black vulture's head | /r/HasProperty | gray
Facets:
Source sentences:
text: Black Vultures have black or gray heads.
text: Black vultures (Coragyps atratus) have gray heads.
text: While adults have a read head, the head of juvenile turkey vultures is gray.
text: It has black plumage and instead of a red head its bald head is gray.