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Wilhelm " Willi " Kuhweide ( born January 6 , 1943 in Berlin ) is a German sailor and olympic champion .
 Wilhelm, Kuhweide, Berlin, German
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wilhelm, Kuhweide, Berlin, German