Assertion: raven's food | /r/HasProperty | taken on the ground
Facets:
value: invariably
type: MANNER
Source sentences:
text: Food is invariably taken on the ground and includes all manner of insects and other invertebrates (= animals without internal skeleton, such as larvae, insects, earthworms, millipedes, snails, spiders), grain taken from animal dung, carrion and scraps of human food.