Assertion: raven's habitat | /r/HasProperty | characterized by equable climates
Facets:
value: during the last 15 million years
type: TEMPORAL
Source sentences:
text: Second, there is an unbroken gradient of vegetation from the tropical rain forest to "boreal coniferous forests that has persisted and afforded habitats characterized by equable climates during the last 15 million years, when massive extinctions were taking place elsewhere in the Northern Hemisphere...such continuity is interrupted in North America by the Gulf of Mexico and in Europe by the Alps, the Mediterranean, and the Sahara Desert.