Assertion: prairie dog | /r/HasProperty | primary diet
Facets:
value: for black-footed ferrets
type: TRANSITIVE-OBJECT
Source sentences:
text: Prairie dogs are a common prey for raptors, coyotes, badgers, and they are the primary diet for black-footed ferrets.
text: Black-footed ferrets, for example, can’t dig tunnels for themselves, and they use prairie dog burrows instead for shelter; prairie dogs are also their primary food source.