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 There have been similar clashes in the past year between Najaf officials and the city 's police and security commanders , and it was not clear on Thursday whether the dissension was related to the gridlock in Iraq 's new national assembly . 
 Iraq, Najaf
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:
 Iraq, Najaf