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In 2003 the English Rugby Football Union Rugby  Canada  and USA Rugby formed an alliance and introduced the  Churchill Cup  to attract fans and players from the U.S. and Canada .
 Canada, Churchill Cup
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 Canada, Churchill Cup