Assertion: narwhal | /r/HasAspect | deep layer of fat
Facets:
Source sentences:
text: A narwhal has a deep layer of fat, or blubber, about 10 cm thick, which comprises one-third of the animal’s weight and acts as insulation in the cold Arctic waters.
text: The narwhal has a deep layer of fat, or blubber, about 10 cm thick, which forms about one-third of the animal’s weight and acts as insulation in the cold Arctic waters.