Assertion: walrus's tusk | /r/ObjectUse | used for self-defense
Facets:
value: against the polar bear
type: TRANSITIVE-OBJECT
value: against other predators
type: PURPOSE
value: against whales
type: PURPOSE
Source sentences:
text: The tusk can grow up to 20 inches and is used for self-defense against the polar bear, whales, and other predators.