Assertion: narwhal | /r/CapableOf | rub their tusks
Facets:
value: together
type: MANNER
value: as means of communication
type: PURPOSE
value: against the tusks of relatives
type: TRANSITIVE-OBJECT
value: with each other
type: TRANSITIVE-OBJECT
Source sentences:
text: Narwhals are known to rub their tusks with each other as means of communication.
text: Narwhals from time to time rub their tusks against the tusks of relatives.
text: When two narwhals rub their tusks together, scientists now hypothesize they're communicating important information about the waters each have traveled through.