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The main event was for the TNA World Heavyweight Championship , in which then-champion Sting defeated the challenger A.J. Styles .
 person: Sting; person: A.J. Styles
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: Sting, A.J. Styles 
Answer:
 person: Sting; person: A.J. Styles