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One analyst said China -- which like Russia and France wields a UN Security Council veto but never threatened to use it to prevent the war -- recently won its role as chief mediator between the United States and North Korea because other regional powers ' confidence in Russia fell as a result of its Iraqi diplomacy .
 attack: war
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: declare bankruptcy, transfer ownership, marry, die, phone write, arrest jail, convict, sue, transfer money, end organization, start organization, end position, merge organization, start position, transport, charge indict, elect, attack, injure, born, extradite, release parole, sentence, demonstrate, meet, trial hearing, divorce, nominate, fine, appeal, pardon, execute, acquit 
Text: {0} 
Answer:
 attack: war