Assertion: alligator | /r/HasProperty | extirpated
Facets:
value: during the plio-pleistocene period
type: TEMPORAL
Source sentences:
text: Alligators are believed to have moved into various parts of Japan either before 25 Mya or after 10 Mya and were extirpated from there during the Plio-Pleistocene period, due to Japan's increased isolation from the continent and harsh climate conditions.