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He was appointed by President George W. Bush in November 2006 and presented his credentials to Ethiopian Prime Minister Meles Zenawi in Addis Ababa on December 6 , 2006 .
 George W. Bush, Meles Zenawi, 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:
 George W. Bush, Meles Zenawi, Addis Ababa