ago, four-legged creatures first walked on land about 350 million years ago, dinosaurs evolved about 220 million years ago, and mammals and modern birds became very diverse about 65 million years ago.
(mammals and modern birds; became; very diverse; T:about 65 million years ago) (dinosaurs; evolved; T:about 220 million years ago) Context(dinosaurs evolved,List([77, 94))):(four-legged creatures; walked; L:on land; T:about 350 million years ago; T:ago; T:first)
dinosaurs evolved,List([77, 94))
mammals and modern birds dinosaurs four-legged creatures
became evolved walked
very diverse T:about 65 million years ago
T:about 220 million years ago
L:on land T:about 350 million years ago T:ago T:first