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The 2004 Men 's Ice Hockey Championship was held between April 24 and May 9 , 2004 in Prague and Ostrava , Czech Republic .
 Ice Hockey, Prague, Ostrava, Czech Republic
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ice Hockey, Prague, Ostrava, Czech Republic