Assertion: plesiosaur's flipper | /r/HasProperty | front
Facets:
Source sentences:
text: The puzzle has finally been broken by a team of computer scientists and paleontologists who found the plesiosaur two front flippers in an underwater flight motion, similar to that of a penguin.
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.