Assertion: narwhal's tusk | /r/HasProperty | flexible
Facets:
Source sentences:
text: The tusk is flexible, able to bend about a foot in any direction without breaking.
text: An additional interesting fact is that the tusk’s tough core and soft outer layer result in a tusk that is both strong and flexible.
text: Its tough core and soft outer layer result in a tusk that is both strong and flexible.