Assertion: narwhal's horn | /r/HasProperty | tooth
Facets:
Source sentences:
text: However, the “horn” or “tusk” is actually a tooth.
text: One Horn, One Tooth
text: The horn is in fact a tooth that grows out of the top of narhwals jaw.
text: This “horn,” which is a tooth, adds to the tales of fantasy surrounding the Narwhal and its origins.
text: Another fun fact: Narwhals are known as the unicorn of the sea and their large horn is actually a tooth!