Assertion: plesiosaur | /r/CapableOf | use their tails
Facets:
value: for locomotion
type: PURPOSE
Source sentences:
text: The plesiosaurs were purely using their limbs to move around whereas most of the aquatic organisms use a tail, so the whales and the dolphins and the fish and even the other marine reptiles such as the icthyosaurs and the mosasaurs, they were all using their tails for locomotion.