Assertion: narwhal's tusk | /r/CapableOf | extend to about 10 feet
Facets:
value: according to the world wildlife fund
type: OTHER
Source sentences:
text: The tusk is actually a tooth that spirals out of the upper jaw on male narwhals, and can extend to about 10 feet (3 meters) long, according to the World Wildlife Fund (WWF) Canada.