Assertion: mastodon | /r/CapableOf | roam north america
Facets:
value: during the pleistocene era
type: TEMPORAL
value: before their extinction
type: TEMPORAL
value: for about 2 million years
type: TEMPORAL
Source sentences:
text: The mastodons that roamed North America until 10,000 years ago are more distantly related and belong to a separate family, Mammutidae.
text: Before their extinction about 10,000 years ago, mastodons roamed North America for about 2 million years.
text: Peyton said both mammoths and mastodons, described as elephant-like mammals, roamed North America during the Pleistocene era which was two million to 12,000 years ago.