Assertion: mastodon's remain | /r/AtLocation | the mainland
Facets:
value: in africa
type: LOCATION
value: in asia
type: LOCATION
Source sentences:
text: Gomphotheres are thought to be the ancestors of the Stegodon, a large elephant-like animal assumed to have been an excellent swimmer, since fossilized remains have been found on islands as well as the mainland in Asia and Africa.