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After talks in Saint Petersburg ' s grand Konstantinovsky Palace , they also warned North Korea to abandon its nuclear aspirations and signed documents implementing the Moscow Treaty , which mandates sharp cuts in Cold War nuclear weapons stocks .
 meet: talks
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:
 meet: talks