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After his schools he invited his friends , Márton Bujdosó , Veronika Simor , György Bartók , Csaba Ajtony , Tamás Várkonyi , Katalin Szalai , Judit Varga , Bálint Bolcsó and Géza Köteles to KOMP-Csoport composer 's group , they have given concerts between 1996-2001 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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