281
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 .
 None
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:
 None