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Under the original organization it had been required that the president and first vice-president should be clergymen ; this was now changed , the various departments of the Union were organized on a business basis , the athletic work was systematized by establishing the Catholic Amateur Athletic League , a branch of the National Union with complete control over all athletic affairs .
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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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