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Juha Grigori Amadeus Lundberg ( born March 29 , 1989 in Helsinki , Finland ) , better known as Amadeus is a Finnish singer .
 Amadeus Lundberg, Helsinki, Finland, Amadeus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Amadeus Lundberg, Helsinki, Finland, Amadeus