Assertion: narwhal | /r/HasAspect | horn
Facets:
value: very rarely
type: DEGREE
Source sentences:
text: Instead, narwhals have a horn that's really a tusk -- a specialized canine tooth -- that grows roughly eight feet from their upper-left jaws.
text: Very rarely, narwhals will actually have two horns.
text: And why do Narwhals have horns?