Assertion: grizzly bear's mother | /r/AtLocation | hibernation
Facets:
Source sentences:
text: Cubs are born singly or up to three at a time, generally in January or February, while the mother is still in hibernation.
text: The cubs are born in January-March while the mother is still in hibernation and weigh only half a kilogram at birth (Dewey and Ballenger, 2002).