Assertion: narwhal's tusk | /r/CapableOf | grow in spiral pattern
Facets:
value: out of the animal's head
type: LOCATION
value: through a hole in their lip
type: MANNER
Source sentences:
text: This “tusk” is actually a tooth that grows in a spiral pattern through a hole in their lip.
text: Researchers have speculated that the tusk, which grows out of the animal's head in a spiral pattern, was used as an environment sensor or to hunt.