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Mesa County Valley School District 51 is a school district in Mesa County and the tenth largest school district in Colorado .
 organization: Mesa; organization: Valley; organization: 51; location: Mesa County
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Mesa, Valley, 51, Mesa County 
Answer:
 organization: Mesa; organization: Valley; organization: 51; location: Mesa County