Assertion: tern's forehead | /r/CapableOf | become white
Facets:
value: in winter
type: TEMPORAL
value: in non-breeding adults
type: OTHER
Source sentences:
text: In non-breeding adults the forehead and underparts become white, the bill is all black or black with a red base, and the legs are dark red or black.
text: In winter, the forehead becomes white and the body plumage a much paler grey.
text: In winter, the forehead becomes white and the bill black.
text: How to identify The sandwich tern is whitish-grey above and white below, with a large black cap (the forehead becomes white in winter) and a shaggy, black crest.
text: In winter, the forehead becomes white.