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Prior to 1997 , the winner of the cup was determined by an annual pre-season baseball game , played each year at minor-league Cooper Stadium in the state capital of Columbus , and staged just days before the start of each new Major League Baseball season .
 Cooper Stadium, Columbus, Major League Baseball
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cooper Stadium, Columbus, Major League Baseball