Question: What is the population  in 2007 of the the city where Addis Abab served as mayor?

Context articles: Alemu Abebe
Muara Enim Regency
Rail transport in Djibouti
Addis Ketema
Diriba Kuma
Gurage people
Workneh Gebeyehu
Addis Ababa
Prabumulih
Mayor of Addis Ababa

Alemu Abebe is an Ethiopian politician.
 He served as mayor of Addis Ababa during the years of Red Terror.
Muara Enim Regency is a regency of South Sumatra Province, Indonesia.
 The capital is the town of Muara Enim.
 The city of Prabumulih is an enclave within the regency but is administratively separate.
 The regency until 2012 covered an area of 8,587.94 km² and had a population of 717,717 at the 2010 Census; the latest official estimate of this area (as at January 2014) is 769,211; however in December 2012 part of the Muara Enim Regency was split off to form the new Penukal Abab Lematang Ilir Regency.
Rail transport in Djibouti is done within the (French: "Société Djiboutienne De Chemin De Fer" ) - Djiboutian Railway Company, which is currently consists of one electrified standard gauge railway lines: the Addis Ababa–Djibouti Railway.
 For more than a century, Djibouti was served by an international metre gauge railway, from Djibouti City to the Addis Ababa in Ethiopia.
Addis Ketema (Amharic: , meaning "new city") is one of the 10 subcities of Addis Ababa, the capital of Ethiopia.
 As of 2011 its population was 271,664.
Diriba Kuma (Amharic: ) is the incumbent Mayor of Addis Ababa, who took office on 9 July 2013.
 Diriba served as Minister of Transport before being elected as Mayor of Addis Ababa.
The Guraghe people are an Ethiopian Semitic-speaking ethnic group inhabiting Ethiopia.
 According to the 2007 national census, its population is 3,567,377 people, of whom 256,737 are urban dwellers.
 This is 2.5% of the total population of Ethiopia, or 18.33% of the Southern Nations, Nationalities, and Peoples' Region (SNNPR).
 The Gurage people traditionally inhabit a fertile, semi-mountainous region in southwest Ethiopia, about 125 kilometers southwest of Addis Ababa, bordering the Awash River in the north, the Gibe River (a tributary of the Omo River) to the southwest, and Lake Zway in the east.
 In addition, according to the 2007 Ethiopian national census the Gurage can also be found in large numbers in Addis Ababa, Oromia Region, Dire Dawa, Harari Region, Somali Region, Amhara Region, Gambela Region, Benishangul-Gumuz Region, and Tigray Region.
Workneh Gebeyehu is an Ethiopian politician.
 In September 2012, he was appointed Minister of Transport and has been serving as an elected member of Addis Ababa City Council.
 He studied BA in Political Science and International Relations (1991) and MA in International Relations (2006) at Addis Ababa University.
 He has been a member of Oromo People`s Democratic Organization and EPRDF since 1991 and an executive member of both parties since 2012 and commissioner general of the Ethiopian Federal Police Commission from 2001 to 2012.
 Since 1 November 2016, he has served as Minister of Foreign Affairs following a cabinet reshuffle, succeeding Tedros Adhanom.
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.
 It has a population of 3,384,569 according to the 2007 population census, with annual growth rate of 3.8%.
 This number has been increased from the originally published 2,738,248 figure and appears to be still largely underestimated.
Prabumulih is a city in South Sumatra, Indonesia.
 It has an area of 421.62 km² and had a population of 161,814 at the 2010 Census; the latest official estimate (as at January 2014) is 173,858.
 Geographically, this city is located at 3°25′58″S 104°14′8″E in the heart of the province, and is surrounded on all sides by Muara Enim Regency apart from a short stretch bordering Penukal Abab Lematang Ilir Regency.
The Mayor of the Addis Ababa is head of the executive branch of Addis Ababa's municipal government.
 The mayor's office is located in Addis Ababa City Hall.