53585
Sudan 's leaders sent out a letter last week warning governments against volunteering their troops for a United Nations peacekeeping force for Darfur .
 country of administrative divisions: Sudan, Darfur; location contains: Sudan, Darfur; administrative division of country: Darfur, Sudan
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:  Sudan, Darfur; Sudan, Darfur; Darfur, Sudan 
Answer:
 country of administrative divisions: Sudan, Darfur; location contains: Sudan, Darfur; administrative division of country: Darfur, Sudan