Assertion: trumpeter swan | /r/HasProperty | extirpated in the united states
Facets:
value: by the early twentieth century
type: TEMPORAL
value: nearly
type: DEGREE
Source sentences:
text: By the early twentieth century breeding trumpeter swans were nearly extirpated in the United States, with a remnant population of fewer than 70 wild trumpeters in remote hot springs in or near Yellowstone National Park.