570
Talks between North Korea , the United States and China ended Thursday with U . S . State Department officials saying it was uncertain whether discussions on Pyongyang ' s nuclear program would continue .
 North Korea: entity; United States: entity; China: 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:
 North Korea: entity; United States: entity; China: entity