Assertion: male narwhal | /r/HasAspect | single tusk
Facets:
value: commonly
type: TEMPORAL
Source sentences:
text: Male narwhals commonly have a single tusk though a few may also have two tusks.
text: Most male narwhals have a single tusk, and most female narwhals do not have a tusk at all.
text: Male narwhals commonly have a single tusk though a few may also have two tusks.