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Rutford served as Director of the Division of Polar Programs , National Science Foundation , 1975-1977 .
 person: Rutford
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: Rutford 
Answer:
 person: Rutford