Assertion: feather's bird | /r/HasProperty | average
Facets:
Source sentences:
text: Of the 2,000 to 4,000 feathers that cover an average bird, most are downy: they have fewer than 100 feathers for flight.
text: Of the 2,000 to 4,000 feathers that cover an average bird, most are downy: they have fewer than 100 feathers for flight.