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Visaltiakos Football Club is a Greek football club , based in Nigrita , Serres Prefecture , Central Macedonia .
 Visaltiakos, Greek, Nigrita, Serres Prefecture, Central Macedonia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Visaltiakos, Greek, Nigrita, Serres Prefecture, Central Macedonia