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Sting won a tournament to become the new WCW United States Heavyweight Champion on August 25 , and this put Sting in contention for the WCW World Heavyweight Championship .
 Sting, Champion, Sting
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sting, Champion, Sting