Assertion: mastodon's population | /r/HasProperty | absent
Facets:
Source sentences:
text: Whether the two species were sympatric and lived there simultaneously, or if the woolly mammoths entered southern areas when Columbian mammoth populations were absent is unknown.
text: It is unknown whether the two species were sympatric and lived there simultaneously, or if the woolly mammoths may have entered these southern areas during times when Columbian mammoth populations were absent there.