Assertion: hummingbird | /r/CapableOf | start migration
Facets:
value: the sooner
type: MANNER
value: in response to environmental triggers
type: CAUSE
value: in order to make their trip
type: PURPOSE
Source sentences:
text: Hummingbirds will typically gain 25-40 percent of their body weight before they start migration in order to make their trip.
text: Scientists believe that each hummingbird begins its migration in response to environmental triggers.
text: Total migration distance: The further hummingbirds have to migrate, the sooner they start their journey.
text: It could also be that they were sick, weak or injured at the time when other hummingbirds were starting their migration.