Assertion: wagtail's belly | /r/HasProperty | white
Facets:
Source sentences:
text: Belly and outer tail feathers are white.
text: Belly and outer tail feathers are white.
text: The head, throat, back, wings and upper parts are black, and the belly is white, making it look like it is wearing a smart evening suit.
text: The throat is white with black streaks, and the belly and undertail coverts are white.