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He was an administrative assistant to Senator Robert A. Taft from 1944 to 1953 , and then to President Dwight Eisenhower from 1953 to 1958 .
 person: Robert A. Taft
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: Robert A. Taft 
Answer:
 person: Robert A. Taft