Assertion: robin's number | /r/CapableOf | migrate into northern u.s.
Facets:
value: in the summer
type: TEMPORAL
value: north
type: LOCATION
Source sentences:
text: It can be seen for most of the year over large areas of North America, with large numbers migrating north into Canada and the northern U.S. in the summer, and heavy numbers migrating south into Central America for the winter.