Assertion: sea otter's flipper | /r/HasProperty | rear
Facets:
Source sentences:
text: Sea otters have paw-like front limbs and rear flippers, while all four seal limbs are modified to form flippers.
text: Sea otters use their rear flippers to move and their flat, muscular tails to steer.
text: ’s surface using their rear flippers to move and their tails to steer.
text: Sea otters use their rear flippers to move and their flat, muscular tails to steer.