Question: What Bison heard is a herd of 250–400 American bison in Wind Cave National Park, South Dakota, USA, that  is one of two subspecies/ecotypes of the American bison?
Sentence (from "Wind Cave bison herd"): The Wind Cave bison herd is a herd of 250–400 American bison in Wind Cave National Park, South Dakota, USA.
Relevant evidence: No