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Gamson conducted almost all of the company 's performances during the 1950s ; concerts which mostly featured rarely heard operas from a variety of musical eras .
 person: Gamson
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: Gamson 
Answer:
 person: Gamson