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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 ."
 Rwanda: place; Tutsis: target; sympathizers: target
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 Rwanda: place; Tutsis: target; sympathizers: target