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History Arc was started in 1978 by then - Carleton University Professors Christopher Levenson , Michael Gnarowski and Tom Henighan .
 organization: Carleton University; person: Christopher Levenson
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: Carleton University, Christopher Levenson 
Answer:
 organization: Carleton University; person: Christopher Levenson