Assertion: wolf | /r/CapableOf | help reduce an overpopulation of elk
Facets:
value: in the years
type: TEMPORAL
value: in the park
type: LOCATION
Source sentences:
text: In the years since they were reintroduced to Yellowstone National Park and central Idaho, wolves have helped reduce an overpopulation of elk in the Park, and have kept elk from lingering undisturbed in Aspen groves and along streams.