Question: Who was in charge of the city where Eser is headquartered?

full_context: Document 1: Düzce: Düzce is the capital city of Düzce Province is the eighty-first Province in Turkey. Dursun Ay (AKP) was elected the mayor in the provincial council after Mehmet Keleş resigned from the position. The population in 2009 was 125,240, an increase from 61,878 in 1990.
Document 2: Unitech Group: The company is based in New Delhi and ranks 1484, in Forbes Global 2000 listing of the top 2000 public companies in the world by Forbes magazine, 32nd in India. Its construction business includes highways, roads, powerhouses, transmission lines, and it has residential projects called Unitech Cities/Uni World, in cities like Mumbai, Delhi, Kolkata , Bhubaneswar, Chennai, Hyderabad,Mohali, Bangalore, Kochi, Noida,Greater Noida, Agra, Lucknow, Varanasi,Gurgaon, and Ghaziabad.
Document 3: Aksigorta: Aksigorta is an insurance company in Turkey, belonging to Sabanci Holding in partnership with Belgian insurer Ageas, an international insurance company with more than 180 years experience in the sector. Ageas has acquired a 31% stake in Aksigorta, paying USD 220 million for shares previously owned by Sabancı Holding. As a result of this acquisition, Ageas and Sabancı Holding now have equal control of the company.
Document 4: International Trade Office Group: The ITO Group one of the largest Egyptian companies founded in 1979 by engineer Karim Fathi Ashmawi concerns mainly with all activities of import and export, and supplying many industrial sectors with its demand of raw material the group's activities is expanded to include several other sectors,(International Crane Factory I.C.F) - (International Coke Company I.C.C) - (International Shipping Company I.S.C) -( International Integrated Systems I.I.S),the ITO group headquartered is located in Alexandria, Egypt.
Document 5: Turkey: Turkey (Turkish: Türkiye (ˈtyɾcije)), officially the Republic of Turkey (Turkish: Türkiye Cumhuriyeti (ˈtyɾcije d͡ʒumˈhuɾijeti) (listen)), is a transcontinental country in Eurasia, located mainly in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe. Turkey is bordered by eight countries: Greece and Bulgaria to the northwest; Georgia to the northeast; Armenia, the Azerbaijani exclave of Nakhchivan and Iran to the east; and Iraq and Syria to the south. The country is encircled by seas on three sides, with the Aegean Sea to the west, the Black Sea to the north, and the Mediterranean Sea to the south. The Bosphorus, the Sea of Marmara, and the Dardanelles, which together form the Turkish Straits, divide Thrace and Anatolia and separate Europe from Asia. Ankara is the capital while Istanbul is the country's largest city and main cultural and commercial centre, classified as a leading global city.
Document 6: Greek Radical Movement: The next year, in the local elections of 1990, Antonis Tritsis decided to run for the Municipality of Athens. He send a letter to the leaders of all political parties and asked their support. On October 14, 1990, Tritsis elected Mayor of Athens as the leader of a coalition between New Democracy and Greek Radical Movement.
Document 7: Eser (Construction firm): Eser is an international construction company based in Ankara, Turkey, and active in the Middle East, Central Asia, East Europe and Sub-Saharan Africa. The company trades under the registered name of Eser Taahhüt ve Sanayi A.Ş. (English: Eser Contracting and Industry Co.Inc.). Eser is listed by Engineering News Record as one of the Top 225 International Contractors of the World.
Document 8: Alghanim Industries: Alghanim Industries is one of the largest privately owned companies in the Persian Gulf region, predominantly in Kuwait. A multinational company in outlook with operations in 40 countries, Alghanim Industries is a multibillion-dollar conglomerate with more than 30 businesses. They also fund projects and provide loans for non-UAE/Middle East countries. Alghanim Industries claimed that it collected revenues of $2.5 billion in 2009, although has not disclosed its financial standing since.
Document 9: Construction: In 2010 a salary survey revealed the differences in remuneration between different roles, sectors and locations in the construction and built environment industry. The results showed that areas of particularly strong growth in the construction industry, such as the Middle East, yield higher average salaries than in the UK for example. The average earning for a professional in the construction industry in the Middle East, across all sectors, job types and levels of experience, is £42,090, compared to £26,719 in the UK. This trend is not necessarily due to the fact that more affluent roles are available, however, as architects with 14 or more years experience working in the Middle East earn on average £43,389 per annum, compared to £40,000 in the UK. Some construction workers in the US/Canada have made more than $100,000 annually, depending on their trade.
Document 10: Ankara: Melih Gökçek has been the Metropolitan Mayor of Ankara since 1994 as a politician from the Welfare Party. He later joined the Virtue Party and then the AKP. Initially elected in the 1994 local elections, he was re-elected in 1999, 2004 and 2009. In the 2014 local election, Gökçek stood for a fifth term. The MHP metropolitan mayoral candidate for the 2009 local elections, conservative politician Mansur Yavaş, stood as the CHP candidate against Gökçek. In a heavily controversial election, Gökçek was declared the winner by just 1% ahead of Yavaş amid allegations of systematic electoral fraud. With the Supreme Electoral Council and courts rejecting Yavaş's appeals, he has declared intention to take the irregularities to the European Court of Human Rights. Although Gökçek was inaugurated for a fifth term, most election observers believe that Yavaş was the winner of the election.
Document 11: Ali Babacan: Ali Babacan (; born 4 April 1967 in Ankara, Turkey) is a Turkish politician. He is member of the parliament and former Deputy Prime Minister of Turkey responsible for the Economy. He first served as the Minister of State in charge of economic affairs in the 58th cabinet from the Justice and Development Party (AK Party). He retained this position throughout the 58th and 59th Governments of the Republic of Turkey. On 29 August 2007 he was appointed as the Minister of Foreign Affairs of the 60th Government of the Republic of Turkey. During 2009–2015 he served as the Deputy Prime Minister for Economic and Financial Affairs of Turkey. He is married with three children. In 2019, Babacan left the AKP, citing “deep differences” over the party’s direction as a reason.
Document 12: Akureyri: The last elections to the town council were held on May 31, 2014. The People's List (Listi fólksins), which won an outright majority in 2010, and The Town List (Bæjarlistinn) merged into L-list, The Town List of Akureyri. They had seven representatives together but now have only two, 18.8%. The Independence Party (Sjálfstæðisflokkurinn) received the most votes, three seats in the council, 25.8%, instead of only one previously. Social Democratic Alliance (Samfylkingin) and Progressive Party (Framsóknarflokkurinn) each got two seats instead of the previous one each. Left-Green Movement (Vinstri hreyfingin grænt framboð) and Bright Future (Björt framtíð) each got one seat. L-list, Social Democratic Alliance, and Progressive Party formed a new majority in the council. The new majority decided that Eiríkur Björn Björgvinsson, mayor of Akureyri since 2010, would continue to serve as mayor.
Document 13: Şükrü Sina Gürel: A native of İzmir and a member of the Democratic Left Party (DSP), Gürel represented his country at the Council of Europe from 22 April 1996 to 26 January 1998. He became foreign minister following the resignation of his predecessor, İsmail Cem on 10 July 2002. Later in the year he ceded the office to Yaşar Yakış.
Document 14: Hanover: Various industrial businesses are located in Hannover. The Volkswagen Commercial Vehicles Transporter (VWN) factory at Hannover-Stöcken is the biggest employer in the region and operates a huge plant at the northern edge of town adjoining the Mittellandkanal and Motorway A2. Jointly with a factory of German tire and automobile parts manufacturer Continental AG, they have a coal-burning power plant. Continental AG, founded in Hanover in 1871, is one of the city's major companies, as is Sennheiser. Since 2008 a take-over is in progress: the Schaeffler Group from Herzogenaurach (Bavaria) holds the majority of the stock but were required due to the financial crisis to deposit the options as securities at banks. TUI AG has its HQ in Hanover. Hanover is home to many insurance companies, many of which operate only in Germany. One major global reinsurance company is Hannover Re, whose headquarters are east of the city centre.
Document 15: Macit Özcan: Macit Özcan, (born 1954 in Karataş, Adana Province, Turkey) is a Turkish politician of the Republican People's Party (CHP) and the former mayor of Mersin.
ground_truth: Melih Gökçek
sub_queries: Eser >> headquarters location Answer: Ankara
Who was in charge of Ankara ? Answer: Melih Gökçek