Assertion: human's ancestor | /r/HasProperty | h. erectus
Facets:
Source sentences:
text: Most researchers agree that the immediate ancestor of Homo sapiens was H. erectus, which first appeared 1.8 million years ago.
text: However, in 2007, new findings suggest that the two species coexisted and may be separate lineages from a common ancestor instead of H. erectus being descended from H. habilis.