Assertion: american crow | /r/CapableOf | gather in place
Facets:
value: according to verbeek
type: OTHER
value: in the southern plains
type: LOCATION
Source sentences:
text: Where food is exceptionally abundant – for instance, in some places in the southern plains – American crows may gather in roosts of more than 2,000,000 birds, according to Verbeek and Caffrey.