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With the encouragement of Sen.  Mike Mansfield  of  Montana  who was the majority leader Sen. Kennedy ran against Long for the job that Byrd had patiently been awaiting .
 Mike Mansfield, Montana
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:
 Mike Mansfield, Montana