Assertion: narwhal's tusk | /r/HasProperty | single
Facets:
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.
text: Nor is it correct, stated in that way, because most narwhals have a single tusk.
text: It has a single tusk that can protrude up to 8 feet in length and stems from the upper jaw.