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After winning reelection to another four-year term in 1972 , Dennis was named Finance Chairman of the Senate , one of the most powerful Chairmanships .
 person: Dennis
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: Dennis 
Answer:
 person: Dennis