Assertion: sperm whale's male | /r/CapableOf | use their tusks
Facets:
value: in their competition for mates
type: PURPOSE
value: in aggression against one another
type: TEMPORAL
value: to hunt fish
type: PURPOSE
Source sentences:
text: Although a variety of theories have been proposed for the specific function of the narwhal’s tusk, recent observations suggest that the males use their tusks to hunt fish and to detect the level of salt in the waters through which they swim.
text: Previously authorities, including English naturalist Charles Darwin, believed that males use their tusks in aggression against one another in their competition for mates.