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blast at an Iran nuclear facility Iran blames US US breaking news of terrorist attack in near future sounds like some heavy war rhetoric to me .
 terrorist: attacker
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:
 terrorist: attacker