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These ranchers bred some of the bison with cattle in an effort to produce " cattleo " This study , published in 2015 , also showed the Henry Mountains bison herd to be free of brucellosis , a bacterial disease that was imported with non-native domestic cattle to North America .
 Henry Mountains, North America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Henry Mountains, North America