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The most remarkable example of swine CAFO monopoly is found in the United States , where in 2001 , 50 producers had control over 70 % of total pork production .
 location: United States
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: United States