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The Zurich fall cost Engquist a shot at a jackpot of 20 one-kg gold bars which can be won by athletes who clinch their events at all of the Golden Four series in Oslo , Zurich , Brussels and Berlin .
 Oslo, Golden Four, Berlin, Brussels, Zurich, Zurich, Engquist
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Oslo, Golden Four, Berlin, Brussels, Zurich, Zurich, Engquist