Sadr City , the sprawling district that is the base of Mr. Sadr 's support , makes up nearly half the population of Baghdad , which is a province unto itself .
Baghdad /location/location/contains Sadr City
NNP NNP , DT VBG NN WDT VBZ DT NN IN NNP NNP POS NN , VBZ RP RB PDT DT NN IN NNP , WDT VBZ DT NN NN PRP .
Baghdad
LOCATION
Sadr City
LOCATION
/location/location/contains