Assertion: avian dinosaur | /r/CapableOf | become extinct
Facets:
value: at the k–pg boundary
type: TEMPORAL
value: in an event
type: TEMPORAL
Source sentences:
text: The non-avian dinosaurs and more than half of all life on Earth became extinct 65 million years ago in an event that scientists now refer to as the Cretaceous-Tertiary (K-T) mass extinction.
text: All non-avian dinosaurs became extinct at the end of the Cretaceous period, around 66 million years ago.
text: Excluding a few controversial claims, scientists agree that all non-avian dinosaurs became extinct at the K–Pg boundary.