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Before starting in radio in New York , 1929 , he had for three years been director and master of ceremonies at the Metropolitan Theatre , Boston .
 organization: Metropolitan Theatre
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: Metropolitan Theatre 
Answer:
 organization: Metropolitan Theatre