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 That is a group headed by Mitt Romney , the Massachusetts governor who is widely viewed as Mr. McCain 's chief rival for their party 's 2008 presidential nomination . 
 Mitt Romney, Massachusetts
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 Mitt Romney, Massachusetts