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President Bush challenged world leaders on Tuesday to overcome Sudan 's unwillingness to let United Nations peacekeepers into Darfur , but Sudan 's president reiterated his objection to any forces other than those from the African Union . ''
 administrative division of country: Darfur, Sudan; administrative division of country: Darfur, Sudan; country of administrative divisions: Sudan, Darfur; country of administrative divisions: Sudan, Darfur; location contains: Sudan, Darfur; location contains: Sudan, Darfur
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:  Darfur, Sudan; Darfur, Sudan; Sudan, Darfur; Sudan, Darfur; Sudan, Darfur; Sudan, Darfur 
Answer:
 administrative division of country: Darfur, Sudan; administrative division of country: Darfur, Sudan; country of administrative divisions: Sudan, Darfur; country of administrative divisions: Sudan, Darfur; location contains: Sudan, Darfur; location contains: Sudan, Darfur