Assertion: raven's beak | /r/HasProperty | black
Facets:
value: unlike the rook
type: OTHER
value: in color
type: OTHER
Source sentences:
text: While their beak and feet are black in color, the iris of the eye is brown.
text: The rook has a grey-white bill while the carrion crow’s beak is black and looks stouter.
text: Unlike the rook, the crow’s beak is black or grey.