571
Although North Korea accused the United States of leading the region toward war in its state media , U . S . officials denied reports the talks had broken down .
 region: 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:
 region: attacker