Assertion: penguin's feather | /r/HasProperty | gray
Facets:
Source sentences:
text: Juvenile or adolescent African penguins have gray feathers on their head and back, with white undersides.
text: In contrast, the feathers on the back and head of juveniles are gray, and those on their underside are white.
text: In contrast, the downy feathers of chicks are gray.
text: Down feathers of different species may be white, gray, black, or brown.