Assertion: dinosaur's life | /r/HasProperty | dominated by archosaur
Facets:
value: for approximately 120 million years
type: TEMPORAL
Source sentences:
text: For approximately 120 million years—from the Carboniferous to the middle Triassic periods—terrestrial life was dominated by the pelycosaurs, archosaurs, and therapsids (the so-called "mammal-like reptiles") that preceded the dinosaurs.