Assertion: ostrich's feather | /r/HasProperty | light
Facets:
Source sentences:
text: Although feathers are light, a bird's plumage weighs two or three times more than its skeleton, since many bones are hollow and contain air sacs.
text: Unlike the adult ostriches that have black and white feathers (for males) and light brown colored feathers (for females), all the babies are light brown irrespective of their gender.