Statistics for occurrence #1 of “Sioux” in entry indians-american of Harper's Encyclopedia of United States History:

...to have been only eight radically distinct nations known to the earlier settlers— namely, the Algonquian, Huron-Iroquois, Cherokee, Catawba, Uchee, Natchez, Mobilian or Floridian, and Dakota or Sioux . More recently, other distinct nations have been discovered—namely, the Athabascas, Sahaptins, Chinooks, Shoshones, and Attakapas. Others will doubtless be found. The Algonquians were a l...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Sioux (North Dakota, United States) 2 0 0 0 0 user votes
Sioux (Iowa, United States) 0 0 0 0 0 user votes
Sioux (Nebraska, United States) 0 0 0 0 0 user votes
Sioux (North Carolina, United States) 0 0 0 0 0 user votes
Sioux (Wisconsin, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.