Assertion: raven | /r/CapableOf | make call
Facets:
value: only occasionally
type: DEGREE
Source sentences:
text: Only occasionally will a raven make a call similar to a crow's caw, but even then it is so deep as to be fairly easily distinguished from a real crow.
text: Only occasionally will a raven make a call similar to a crow's "caw" but even then it is so deep as to be fairly easily distinguished from a real crow.