Assertion: plesiosaur's flipper | /r/ObjectUse | used for steering
Facets:
value: most likely
type: DEGREE
Source sentences:
text: The simulations show that using their four flippers, the plesiosaurs were able to utilize the most effective swimming motion - its front two flippers are flapped in an underwater flight motion like a penguin, while the rear flippers were most likely used for steering and stability.