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The Franco-Ethiopian railway , linking Djibouti to the heart of Ethiopia , began in 1897 and reached Addis Ababa in June 1917 , increasing the volume of trade passing through the port .
 Djibouti, Ethiopia, Addis Ababa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Djibouti, Ethiopia, Addis Ababa