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In 3x3 , a formalized version of the halfcourt 3-on - 3 game , a dedicated ball with the circumference of a size 6 ball but the weight of a size 7 ball is used in all competitions ( men 's , women 's , and mixed teams ) .
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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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