2238
and no one knows how long america ' s new war on terrorism will keep the " uss john c . stennis " engaged in battle .
 america: 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:
 america: attacker