Assertion: national park's mountain | /r/CapableOf | extend to the west
Facets:
value: from boise
type: LOCATION
value: from idaho
type: LOCATION
Source sentences:
text: Yellowstone is at the northeastern end of the Snake River Plain, a great U-shaped arc through the mountains that extends from Boise, Idaho some 400 miles (640 km) to the west.