When the American invasion of Iraq began in March 2003 , Kurdish militias advanced southward from the Kurdish autonomous zone established in the northern third of Iraq in 1991 and entered Kirkuk .
Iraq /location/location/contains Kirkuk
Iraq /location/location/contains Kirkuk
WRB DT JJ NN IN NNP VBD IN NNP CD , JJ NNS VBD RB IN DT JJ JJ NN VBN IN DT JJ JJ IN NNP IN CD CC VBD NNP .
Iraq
LOCATION
Kirkuk
LOCATION
/location/location/contains
Iraq
LOCATION
Kirkuk
LOCATION
/location/location/contains