Assertion: mastodon | /r/AtLocation | north and central america
Facets:
value: primarily
type: DEGREE
Source sentences:
text: Mastodons, on the other hand, appeared about 27 million to 30 million years ago, primarily in North and Central America.
text: Though mastodons appeared primarily in North and Central America, they eventually spread all over the world, in every continent except for Antarctica and Australia.