Assertion: beaver's fur | /r/HasProperty | waterproof
Facets:
Source sentences:
text: Their fur is naturally oily and waterproof.
text: The fur is waterproof, and the texture is akin to that of a mole.
text: They are mainly nocturnal and are very comfortable in the water since their fur is waterproof and their feet are webbed.
text: They weigh about 14 ounces, and are already covered with waterproof fur.