921
Giving cover for the deployment , U . S . warplanes struck Iraqi ground troops and bunkers in northern Iraq .
 Iraq: place; troops: target; bunkers: target; warplanes: 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:
 Iraq: place; troops: target; bunkers: target; warplanes: instrument