In Mosul , the northern oil center that is Iraq 's second-largest city , at least five police officers were killed by a bomb left in a parked car that exploded as their patrol passed by .
Iraq /location/location/contains Mosul
IN NNP , DT JJ NN NN WDT VBZ NNP POS JJ NN , IN JJS CD NNS NNS VBD VBN IN DT NN VBD IN DT VBN NN WDT VBD IN PRP$ NN VBN IN .
Iraq
LOCATION
Mosul
LOCATION
/location/location/contains