Assertion: gray whale | /r/CapableOf | feed at the surface
Facets:
value: at depth
type: MANNER
Source sentences:
text: They feed both at the surface and also at depth, following the diurnal vertical migrations of their prey to at least 100 m. Incubation 12 months Nursing Duration Calves are weaned at eight months, when they gain as much as 90 kg (200 lbs.) a day Sexual Maturity