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Ice yachting is the sport of sailing and racing iceboat s , also called ice yacht s. It is practiced in Austria , Germany , Great Britain , Poland , Norway and Sweden , to some extent , and is very popular in the Netherlands and on the Gulf of Finland , but its highest development is in the United States and Canada .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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