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A skating competition between Axel Paulsen and Renke van der Zee from Holland on Frognerkilen in 1885 , when van der Zee challenged Paulsen for his title " amateur champion of the world " , attracted approximately 30,000 spectators .
 Axel Paulsen, Paulsen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Axel Paulsen, Paulsen