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Career A member of the U.S. Army 's World Class Athlete Program , Sergeant Christopher Downs only took up boxing in 2003 at an advanced age .
 organization: U.S. Army; person: Christopher Downs
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: U.S. Army, Christopher Downs 
Answer:
 organization: U.S. Army; person: Christopher Downs