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Simon Nicolaas ( Simon ) Keizer ( Volendam , born 16 May 1984 ) is a Dutch singer - songwriter .
 Simon, Simon, Keizer, Volendam, Dutch
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Simon, Simon, Keizer, Volendam, Dutch