Assertion: shark's tendency | /r/CapableOf | head butt
Facets:
value: as a prelude to attacking
type: PURPOSE
Source sentences:
text: The name also refers to their pugnacious nature and a tendency to head-butt their prey as a prelude to attacking.
text: The name also refers to their pugnacious nature and a tendency to head-butt their prey as a prelude to attacking.