Assertion: bird | /r/CapableOf | leave tropical areas
Facets:
Source sentences:
text: Scientists believe one reason that many birds leave tropical areas for locations in the United States and Canada is because predators in Central and South America are more active from March through September.
text: Scientists believe one reason that many birds leave tropical areas for locations in the United States and Canada is because predators in Central and South America are more active from March through September.