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At age 15 he released his first album through Universal Music Korea , featuring the music of Arvo Pärt and Leoš Janáček .
 Universal Music Korea, Arvo Pärt, Leoš Janáček
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Universal Music Korea, Arvo Pärt, Leoš Janáček