Assertion: walrus | /r/CapableOf | begin their return migration
Facets:
value: to the bering sea
type: TRANSITIVE-OBJECT
value: southward from the chukchi sea
type: LOCATION
value: by late fall
type: TEMPORAL
Source sentences:
text: By late fall, walruses begin their return migration southward from the Chukchi Sea to the Bering Sea, ahead of the advancing sea ice.