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Seven athletes went into Friday 's penultimate meeting of the series with a chance of winning the prize and American men 's 400 metres hurdles champion Derrick Adkins kept his hopes alive in the competition by winning his event in 47.93 .
 person: Derrick Adkins; else: American
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities: Derrick Adkins, American 
Answer:
 person: Derrick Adkins; else: American