Assertion: vampire | /r/CapableOf | feed human blood
Facets:
value: on blood
type: TRANSITIVE-OBJECT
value: preferably
type: MANNER
value: to survive
type: PURPOSE
Source sentences:
text: A vampire must feed on blood to survive — preferably human blood — although they can subsist on animal blood.
text: Vampires feed on human blood while zombies feed on human brains.