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But those close to the boxer acknowledge that the man who has won championships in four different weight classes -- lightweight , welterweight , junior middleweight and middleweight -- is drawing close to the end of his career .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 None