Assertion: gull's head | /r/HasProperty | gray
Facets:
value: slate
type: DEGREE
value: in breeding season
type: TEMPORAL
Source sentences:
text: In breeding season the head is either pure white, black, gray, or brown; it becomes streaked or smudgy in winter.
text: Its head is gray when not breeding and white when it is.
text: Bonaparte's gulls are slate-gray headed with a very small black bill and bright orange-red legs and feet.
text: Its head is gray when it is not breeding and white when it has its breeding plumage.