Assertion: bear's ancestor | /r/HasProperty | common
Facets:
Source sentences:
text: After studying DNA from polar bears, brown bears and black bears, researchers believe that the brown bear and polar bear have a common ancestor but the lines split some 600,000 years ago.
text: After studying DNA from polar bears, brown bears and black bears, researchers believe that the brown bear and polar bear have a common ancestor but the lines split some 600,000 years ago.