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It is perhaps the largest " Arab " tribe in the Anglo-Egyptian Sudan , and its many clans are scattered over the country extending SW from the province of Dongola to the confines of Darfur .
 Sudan, Dongola, Darfur
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sudan, Dongola, Darfur