Whatever Angola 's problems , the country feels like an oasis of serenity compared with , say , Nigeria , Africa 's biggest oil supplier .
Africa /location/location/contains Angola
Africa /location/location/contains Nigeria
WDT NNP POS NNS , DT NN VBZ IN DT NN IN NN VBN IN , VB , NNP , NNP POS JJS NN NN .