A five-second search finds that North Korean media have used '' sea of fire '' 18 times since June 1997 , variously threatening Seoul , Tokyo , Washington and American bases in South Korea . ''
South Korea /location/location/contains Seoul
South Korea /location/country/capital Seoul
Seoul /location/administrative_division/country South Korea
South Korea /location/country/administrative_divisions Seoul
DT JJ NN VBZ IN JJ JJ NNS VBP VBN '' NN IN NN '' CD NNS IN NNP CD , RB VBG NNP , NNP , NNP CC NNP NNS IN NNP NNP . ''