Assertion: feather's bird | /r/HasProperty | alive
Facets:
Source sentences:
text: In addition to obtaining down from slaughtered birds, a large amount of down is torn from the bodies of birds who are still alive.
text: While birds are alive, they are susceptible to several different pests including lice and mites.
text: in fact, some of the feathers in his collection once belonged to birds that are still alive!