Assertion: mass extinction | /r/HasProperty | identified
Facets:
value: based on the fossil evidence
type: OTHER
Source sentences:
text: The five mass extinctions can be identified at the end of the Ordovician, Devonian, Permian, Triassic, and Cretaceous periods.
text: Five mass extinctions can be identified based on the fossil evidence at the end of the Ordovician, Devonian, Permian, Triassic, and Cretaceous periods.
text: Aside from smaller, less insignificant extinctions, Earth has experienced five “mass extinctions” that have been identified and confirmed by many fossil records.