Early Friday morning , a gun battle broke out in the impoverished Shiite neighborhood of Sadr City in Baghdad , witnesses reported .
Baghdad /location/location/contains Sadr City
RB NNP NN , DT NN NN VBD RP IN DT JJ JJ NN IN NNP NNP IN NNP , NNS VBD .
Baghdad
LOCATION
Sadr City
LOCATION
/location/location/contains