187
In an April 30 , 2001 , Washington Times column , Nat Hentoff noted that the media have devoted " scant mention " to the " plain fact that it was Mr . Annan , when he was head of the United Nation ' s peacekeeping office , who could have prevented the slaughter of 800 , 000 Tutsis and their sympathizers in Rwanda in 1994 ."
 attack: slaughter
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: slaughter