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Britain 's Naseem Hamed retained his WBO featherweight title on Saturday when Mexico 's Manuel Medina was retired by his corner at the end of the 11th round .
 person: Naseem Hamed; location: Mexico; location: Britain; person: Manuel Medina; organization: WBO
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:
 person: Naseem Hamed; location: Mexico; location: Britain; person: Manuel Medina; organization: WBO