Assertion: tern's underpart | /r/HasProperty | white
Facets:
Source sentences:
text: Its back and upper wings are a light pearly-grey, while its underparts are white.
text: The underparts are white; upper tail is black with white outer edges.
text: The upperparts are very pale gray, nearly white, and the underparts are white.
text: Underparts are white.
text: The underparts are white; upper tail is black with white outer edges.
text: The forehead and underparts are white.
text: The underparts and forehead are white, and the underwings as the adult.
text: The upperparts are very pale gray, nearly white, and the underparts are white.
text: Underparts and forehead are white.