Assertion: narwhal's tusk | /r/MadeOf | ivory
Facets:
value: somewhere in the section
type: LOCATION
Source sentences:
text: Can you add that the tusks are made of Ivory somewhere in the section about teeth and tusks.
text: Tusk is made of ivory.
text: A narwhal’s tusk, which is made of ivory, has 10 million nerve endings inside and is the only straight tusk in the world.