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 /business/person/company WPP Group
DT NN VBZ NN NN , JJ NN IN DT NNP NNP NNP IN NNP , CC NNP NNP NNP , JJ NN IN DT NNP NNP , DT NN POS JJ NN NN IN DT NNP NNP .
Martin Sorrell
PERSON
WPP Group
ORGANIZATION
/business/person/company