People were not only exploited for their work but also kept in a state of slavery , '' Italy 's national anti-Mafia prosecutor , Piero Grasso , told reporters at a news conference on Tuesday in Bari .
Italy /location/location/contains Bari
NNS VBD RB RB VBN IN PRP$ NN CC RB VBD IN DT NN IN NN , '' NNP POS JJ JJ NN , NNP NNP , VBD NNS IN DT NN NN IN NNP IN NNP .
Italy
LOCATION
Bari
LOCATION
/location/location/contains