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On October 1 , 2009 , Mayer posted via Twitter : " Track listing on Battle Studies is complete !
 person: Mayer
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: Mayer 
Answer:
 person: Mayer