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In 1934 , Winston Churchill is deep in his wilderness years , and struggling to complete his biography of his ancestor the Duke of Marlborough , which he hopes will revive his fortunes .
 person: Winston Churchill; person: Marlborough
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: Winston Churchill, Marlborough 
Answer:
 person: Winston Churchill; person: Marlborough