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North Korea and China fought against the United States in the 1950 - 53 Korean War , which ended without a peace treaty .
 North Korea: attacker; China: 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:
 North Korea: attacker; China: attacker