Assertion: monarch butterfly | /r/CapableOf | complete annual migration
Facets:
value: in a mexican forest
type: LOCATION
value: to winter home
type: PURPOSE
Source sentences:
text: Habitat destruction has been a concern as the number of monarch butterflies that completed an annual migration to their winter home in a Mexican forest sank in 2013 to its lowest level in at least two decades, due mostly to extreme weather and changed farming practices in North America.