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Many of the world 's largest producers of pigs ( US , China , Mexico ) use gestation crates but some nations and nine US states have banned and removed these crates .
 location: US; location: China; location: Mexico; location: US
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: US; location: China; location: Mexico; location: US