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With her second song , called “ Bole ove usne neverne ” / ” These unfaithful lips hurt ” / , she competed at “ Grand festival ” ( 2008 ) , the biggest festival of Serbian folk music ) .
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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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