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E. Power Biggs , often a featured organist for the orchestra , lobbied hard for a thinner bass sound and accentuated treble .
 person: E. Power Biggs
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: E. Power Biggs 
Answer:
 person: E. Power Biggs