Assertion: narwhal's tusk | /r/HasProperty | distinctive
Facets:
Source sentences:
text: Male narwhals have a distinctive tusk, which in fact is a long tooth.
text: Marine biologists may be able to tell us why the narwhal has a distinctive spiraling tusk, but their scientific perspective differs from the explanation provided by the folklore of the Inuit people, who have lived among narwhals for many thousands of years.