Assertion: mammoth | /r/CapableOf | enter north america
Facets:
Source sentences:
text: Approximately 1.5 to 1.8 million years ago the first mammoths entered North America.
text: Approximately 1.5 to 1.8 million years ago the first mammoths entered North America.
text: Approximately 1.5 to 1.8 million years ago the first mammoths entered North America.