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Aleksandar Popović ( , born 2 November 1983 in Klagenfurt ) is an Austria born Serbian football player , who currently plays for FK Beograd .
 Aleksandar Popović, Klagenfurt, Austria, Serbian, FK Beograd
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Aleksandar Popović, Klagenfurt, Austria, Serbian, FK Beograd