Assertion: sea otter's tail | /r/CapableOf | act as rudder
Facets:
Source sentences:
text: It has a strong, flat tail that acts as a rudder, and large, flipper-like hind feet that propel it through the water; the Sea Otter Animal smaller forepaws have retractable claws, like a cat’s, which the sea otter uses for holding food and grooming its fur
text: Webbed feet and powerful tails, which act like rudders, make otters strong swimmers.
text: They have very dense brown fur and a strong, flat tail that acts as a rudder.