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The Tug of war competition at the World Games 2009 took place from July 18 to July 19 at Jhongshan Affected high school gymnasium ( indoor ) and Jhongshan Affected High School ( Outdoor ) .
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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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