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Mike Tyson vs. James Smith was a professional boxing match contested on March 7 , 1987 for the WBA and WBC Heavyweight championships .
 Mike Tyson, James Smith, WBA, WBC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mike Tyson, James Smith, WBA, WBC