Assertion: wood bison | /r/CapableOf | have been extinct
Facets:
value: in canada
type: LOCATION
value: due to hybridization with the plains bison
type: CAUSE
value: by 1957
type: TEMPORAL
Source sentences:
text: By 1957, wood bison were thought to have been finally extinct in Canada due to hybridization with the plains bison, which took place in Wood Buffalo National Park between 1925 and 1928.