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Biography In the early 1970s , Dmitri Pokrovsky was a student of conducting at Moscow ’s Gnessin Pedagogical Institute of Music , from which he graduated in 1972 .
 Dmitri Pokrovsky, Gnessin Pedagogical Institute
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dmitri Pokrovsky, Gnessin Pedagogical Institute