It was unclear to them whether the activity was part of plans for a test , or perhaps a feint related to last month 's visit to Washington by President Roh Moo-hyun of South Korea .
Roh Moo-hyun /people/person/nationality South Korea
PRP VBD JJ TO PRP IN DT NN VBD NN IN NNS IN DT NN , CC RB DT NN JJ TO JJ NN POS NN TO NNP IN NNP NNP NN IN NNP NNP .
Roh Moo-hyun
PERSON
South Korea
LOCATION
/people/person/nationality