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Timothy Ryan Sparks ( born 1974 ) is a captain in the United States Marines Corps that served in Operation Moshtarak for which he received the 2011 Leftwich Trophy and a Silver Star .
 organization: United States Marines Corps
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: United States Marines Corps 
Answer:
 organization: United States Marines Corps