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Deputy Secretary of State Robert B. Zoellick will head for Sudan next week , and one of his missions will be to put pressure on its leaders to end the violence in Darfur , the region of western Sudan where Arab militias , aided by the government , have killed as many as 300,000 people in the last two years .
 Sudan, Darfur; Sudan, Darfur; Darfur, Sudan; Darfur, Sudan; Sudan, Darfur; 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; Sudan, Darfur; Darfur, Sudan; Darfur, Sudan; Sudan, Darfur; Sudan, Darfur