Assertion: narwhal's tusk | /r/HasAspect | millions of nerve endings
Facets:
value: inside,
type: LOCATION
Source sentences:
text: The male narwhal’s tusk is more than a mere curiosity: protruding through the upper lip, the tusk, which can grow up to 10 feet (three meters) long, has millions of nerve endings inside, as well as sensory capabilities.