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China and Russia , each a permanent member that could have vetoed the proposal , said the timing was wrong , coming just days before a Sunday deadline set by the Council for Sudan and the Darfur rebels to reach an agreement to end their conflict .
 Sudan, Darfur; Darfur, Sudan; Sudan, Darfur
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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} 
Answer:
 Sudan, Darfur; Darfur, Sudan; Sudan, Darfur