581
The talks are the first high - level U . S .- North Korean contact since tensions over the North ' s nuclear program spiked six months ago over Washington ' s claim that the North said in October it was trying to develop nuclear weapons in violation of a 1994 pledge .
 U . S: entity; North Korean: entity
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: meet 
  Option: entity, place 
Text: {0} 
Answer:
 U . S: entity; North Korean: entity