Assertion: whale's mother | /r/CapableOf | burse their calves
Facets:
value: for 6 to 9 months
type: TEMPORAL
value: before weaning them
type: TEMPORAL
value: at their preferred feeding grounds
type: LOCATION
Source sentences:
text: Mothers burse their calves for 6 to 9 months before weaning them when at their preferred feeding grounds.