Assertion: raven's feather | /r/HasProperty | pure white
Facets:
value: for least their basal
type: OTHER
Source sentences:
text: The white-necked raven is smaller than the American raven, but larger than any of the crows; it has a relatively shorter and deeper bill than the larger raven; and it derives its name from the fact that the feathers of the neck and upper breast are pure white for at least their basal half.