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Joe Louis , after retirement , admitted that he hated being crowded , and that swarmers like untied / undefeated champ Rocky Marciano would have caused him style problems even in his prime .
 person: Joe Louis; person: Rocky Marciano
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Joe Louis; person: Rocky Marciano