Assertion: krill | /r/CapableOf | migrate to the surface
Facets:
value: generally
type: MANNER
value: during the night
type: TEMPORAL
Source sentences:
text: It has long been known that krill migrate to the surface and then to deeper levels in the ocean when not feeding to put themselves out of the line of danger unnecessarily.
text: It is typically only during the night that blue whales will feed on krill near the surface of the water because krill generally migrates toward the surface during the night and dives back down into the ocean during the day.