Nigeria , Africa 's most populous country , is the world 's seventh-largest exporter of petroleum and the fifth-largest supplier to the United States .
Africa /location/location/contains Nigeria
NNP , NNP POS RBS JJ NN , VBZ DT NN POS JJ NN IN NN CC DT JJ NN TO DT NNP NNPS .
Africa
LOCATION
Nigeria
LOCATION
/location/location/contains