Assertion: female humpback | /r/CapableOf | build up their fat reserves
Facets:
value: for mating
type: PURPOSE
value: for the following season's migration
type: PURPOSE
Source sentences:
text: It is now thought that many female humpbacks — those who are not engaged in breeding activities in a given year — probably remain somewhere in the Southern Ocean to feed and build up their fat reserves for the following season's migration and mating.