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The current quintet members are : Živorad Nikolić ( accordion ) , Anastasios Mavroudis ( violin ) , Antonis Hatzinikolaou ( electric guitar ) , Anahit Chaushyan ( piano ) , James Opstad ( double bass ) .
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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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