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He studied at the Moscow Conservatory , his teachers including Konstantin Igumnov and Sergei Taneyev , graduating with a gold medal .
 Moscow Conservatory, Konstantin Igumnov, Sergei Taneyev
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Moscow Conservatory, Konstantin Igumnov, Sergei Taneyev