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According to the liner notes of the compilation release " Rock of Ages : The Definitive Collection " , the band was at a recording studio when lead vocalist Joe Elliott stumbled upon a hymn book left by a member of a children 's choir that had just used the studio .
 person: Joe Elliott
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: Joe Elliott 
Answer:
 person: Joe Elliott