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U.S. sports media credited expansion plans by the Big Ten as being the trigger for a massive wave of conference realignment during this period .
 location: U.S.; organization: Big Ten
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: U.S.; organization: Big Ten