Assertion: narwhal | /r/HasProperty | dubbed the unicorns of the sea
Facets:
value: due to their prominent tusks
type: CAUSE
Source sentences:
text: Dubbed the “unicorns of the sea”, Narwhals are strange and beautiful creatures with a long tusk protruding from their heads.
text: It is a marine animal that is nicknamed the unicorn of the sea.
text: Due to their prominent tusks, narwhals are nicknamed the "unicorns of the sea" and hunted by Inuit populations as an ivory and food source.