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 The dispute involves Yan Gang , chief executive at the Citic Guoan Group in China , and Sir Martin Sorrell , chief executive of the WPP Group , the world 's second-largest agency company behind the Omnicom Group . 
 Martin Sorrell, WPP Group
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:
 Martin Sorrell, WPP Group