Assertion: polar bear's mother | /r/AtLocation | the den
Facets:
value: until mid april
type: TEMPORAL
value: until mid february
type: TEMPORAL
value: till end of march
type: TEMPORAL
Source sentences:
text: The mother along with its cub stay in the den till end of March or start of April.
text: The mother and her cubs remain in the den until mid February or mid April – an involuntary fast for the mother who is living off her fat reserves while also fattening her kids from barely 1 kg (around 2 lb) at birth to 10-15 kg (22-33 lb).