In Nigeria , the epicenter of the disease in Africa , the number of children newly paralyzed by polio has doubled since last year .
Africa /location/location/contains Nigeria
IN NNP , DT NN IN DT NN IN NNP , DT NN IN NNS RB VBN IN NNP VBZ VBN IN JJ NN .
Africa
LOCATION
Nigeria
LOCATION
/location/location/contains