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On February 1 , 1960 Erdman purchased the Rural Radio Network , an interconnected group of six commercial FM radio stations spread across upstate New York .
 person: Erdman
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: Erdman 
Answer:
 person: Erdman