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Unlike much of the Horn of Africa and Middle East which is rich in lucrative crude oil , Djibouti has limited natural resources .
 Horn of Africa, Middle East, Djibouti
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Horn of Africa, Middle East, Djibouti