Assertion: plesiosaur | /r/CapableOf | become extinct
Facets:
Source sentences:
text: All plesiosaurs became extinct as a result of the K-T event at the end of the Cretaceous period, approximately 66 million years ago.
text: Plesiosaurus became extinct at the opening of the Middle Jurassic period (175 MYA), being superseded by its larger, more dominant relatives, like the Elasmosaurus.
text: Actually, no one knows when the plesiosaur became extinct.
text: Actually, no one knows when the plesiosaur became extinct.
text: All plesiosaurs became extinct as a result of the K-T event at the end of the Cretaceous period, approximately 66 million years ago.[citation needed]
text: Both pliosaurs and plesiosaurs survived until the Late Cretaceous, becoming extinct at the end of the era in the end-Cretaceous extinction event.
text: Actually, no one knows when the plesiosaur became extinct.
text: Actually, no one knows when the plesiosaur became extinct.