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We know where they ' re at so we simply avoid them and if for some reason they do get off a lucky shot or they do see us , we have defensive systems on board the airplane to defeat their ammunition .
 they: attacker; us: 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:
 they: attacker; us: target