They have so far included most important European capitals as well as Brussels , the headquarters of NATO and the European Union .
European Union /location/location/contains Brussels
PRP VBP RB RB VBN RBS JJ JJ NNS RB RB IN NNP , DT NN IN NNP CC DT NNP NNP .
European Union
ORGANIZATION
Brussels
LOCATION
/location/location/contains