Question: What is the population  in 2007 of the the city where Addis Abab served as mayor?
Sentence (from "Addis Ababa"): Addis Ababa (Amharic: አዲስ አበባ "Addis Abäba " ] , "new flower"; Oromo: "Finfinne" , ] "Natural Spring(s)") or Addis Abeba (the spelling used by the official Ethiopian Mapping Authority), is the capital and largest city of Ethiopia.
Relevant evidence: No