Assertion: dinosaur | /r/HasProperty | ornithischian
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Source sentences:
text: Dinosaurs include birds and other theropods , sauropodomorphs , and ornithischians —familiar animals that embody the concept of “Dinosauria” erected by British anatomist and paleontologist Richard Owen in 1842, long before the present diversity and relationships of dinosaurs were known.
text: Dinosaurs known from the Morrison Formation include the theropods Allosaurus, Ceratosaurus, Ornitholestes, Saurophaganax, and Torvosaurus; the sauropods Brontosaurus, Brachiosaurus, Camarasaurus, and Diplodocus; and the ornithischians Camptosaurus, Dryosaurus, and Stegosaurus.