Assertion: narwhal's tusk | /r/HasProperty | modified
Facets:
value: highly
type: DEGREE
Source sentences:
text: Tusks grow continuously and are modified to help in feeding and self-defense.
text: Its most distinctive features is its spiral tusk, a highly modified tooth (usually the left) that erupts from the upper jaw in males and may grow to 10 ft (3 m) long.