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The announcement came as U . S . President George W . Bush and South Korean President Roh Moo - hyun were about to meet Wednesday in Washington to discuss North Korea ' s nuclear programs .
 ( meet: meet,  Washington: place, George W . Bush: entity, Roh Moo - hyun: entity) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: declare bankruptcy, transfer ownership, transfer money, marry, transport, die, phone write, arrest jail, convict, sentence, sue, end organization, start organization, end position, start position, meet, elect, attack, injure, born, fine, release parole, charge indict, extradite, trial hearing, demonstrate, divorce, nominate, appeal, pardon, execute, acquit, merge organization, Arguments type: beneficiary, prosecutor, plaintiff, seller, victim, buyer, agent, destination, artifact, organization, recipient, person, place, origin, target, giver, adjudicator, attacker, vehicle, defendant, entity, instrument. 
Text: {0} 
Answer:
 ( meet: meet,  Washington: place, George W . Bush: entity, Roh Moo - hyun: entity) 