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On Wednesday morning inside the Chinese customs yard in the border city of Tumen , small groups of North Koreans , each wearing their mandatory pins with images of either North Korean leader Kim Jong-il or his father , Kim Il-sung , waited to cross the bridge .
 children: Kim Il-sung, Kim Jong-il
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Kim Il-sung, Kim Jong-il 
Answer:
 children: Kim Il-sung, Kim Jong-il