Assertion: tern's leg | /r/HasProperty | covered with scale
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Birds are bipedal: they have two legs which are often covered with scales (small, flat plates which over-lap in the same way as feathers).
text: Birds are bipedal: they have two legs which are often covered with scales (small, flat plates which over-lap in the same way as feathers).