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The truth is that , as director of U . N . peacekeeping , Annan personally refused requests to authorize U . N . peacekeepers in Rwanda to seize weapons and prevent genocide .
 Rwanda: place; weapons: instrument
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; weapons: instrument