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He stepped down as president on December 31 , 2009 and was succeeded by Dr. T. Alan Hurwitz .
 person: T. Alan Hurwitz
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: T. Alan Hurwitz