Assertion: narwhal | /r/HasAspect | straight one
Facets:
value: in the animal kingdom
type: LOCATION
Source sentences:
text: While elephants and warthogs have curved tusks, the narwhal is the only animal known to have a straight one, and their tusk actually spirals around, if you noticed in the pictures.
text: Narwhals have the only straight tusk in the animal kingdom