Behind the politics is a genuine dispute : European officials say that when Poland joined the single market , it ceded authority to veto such mergers to Brussels , where the European Union is based .
European Union /location/location/contains Brussels
IN DT NNS VBZ DT JJ NN : JJ NNS VBP IN WRB NNP VBD DT JJ NN , PRP VBD NN TO VB JJ NNS TO NNP , WRB DT NNP NNP VBZ VBN .
European Union
LOCATION
Brussels
LOCATION
/location/location/contains