Assertion: curve | /r/HasProperty | expressed as central angle
Facets:
value: often
type: TEMPORAL
value: in the u.s.
type: LOCATION
Source sentences:
text: a curved section of track: in the U.S. the curve is often expressed as the central angle, measured in degrees, of a curved section of track subtended by a chord 100 feet (30 meters) long (degree of curve) .