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Captain Richard Michael Trevethan ( 24 January 1895 – 30 December 1971 ) was a World War I flying ace credited with twelve aerial victories .
 person: Trevethan
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: Trevethan 
Answer:
 person: Trevethan