Assertion: sea otter's foot | /r/HasProperty | long
Facets:
Source sentences:
text: The hind feet, which provide most of its propulsion in swimming, are long, broadly flattened, and fully webbed.
text: The hind feet of the sea otter are long, broad, and flipper-like, while the forefeet are small.
text: The hind feet, which provide most of its propulsion in swimming, are long, broadly flattened, and fully webbed.