Last year , Liberia 's voters elected Ellen Johnson Sirleaf , an economist and former Citibank executive , as their president , the first woman to be a head of state in Africa .
Africa /location/location/contains Liberia
JJ NN , NNP POS NNS VBD NNP NNP NNP , DT NN CC JJ NNP NN , IN PRP$ NN , DT JJ NN TO VB DT NN IN NN IN NNP .
Africa
LOCATION
Liberia
LOCATION
/location/location/contains