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Among his classmates were renowned concert pianists Zoltán Kocsis and Dezső Ránki .
 Zoltán Kocsis, Dezső Ránki
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zoltán Kocsis, Dezső Ránki