Assertion: hummingbird | /r/CapableOf | migrate through lowland
Facets:
value: in the western u.s.
type: LOCATION
value: in the spring
type: TEMPORAL
Source sentences:
text: In the western U.S., hummingbirds migrate through the lowlands in the spring and return by way of the mountains in the summer to track the intense blooming of annual plants in meadows—moving ever-higher up the mountain as the summer progresses.