Question: Which one reservations was in South Dakota and Nebraska Great Sioux Reservation or Cheyenne River Indian Reservation?
Sentence (from "Cheyenne River Indian Reservation"): The Cheyenne River Indian Reservation was created by the United States in 1889 by breaking up the Great Sioux Reservation, following its victory over the Lakota in a series of wars in the 1870s.
Relevant evidence: Yes