Question: Fuat Bulca was friends with which founder of the Republic of Turkey?

full_context: Document 1: Headscarf rights in Turkey: Turkey has been a secular state since it was founded by Mustafa Kemal Atatürk in 1923. He introduced the secularization of the state in the Turkish Constitution of 1924, alongside Atatürk's Reforms. However, Ataturk never forbade the headscarf. The headscarf was banned in public institutions because of the 'public clothing regulation' issued after the 1980 coup and began to be implemented in a radical way after the 1997 military memorandum. The ban on the headscarf for public personnel was lifted by the democratization package on 1 October 2013 and with the amendment made in article 5 of the dress code regulation, restrictive provisions were lifted. These were in accordance with the Kemalist Ideology, with a strict appliance of laïcité in the constitution. The issue of the headscarf debate has been very intense and controversial since its ban, along with other prominent religious symbols, in public buildings such as government institutions and public schools, similar to policies in France and Mexico. Turkey is a secular country and over 95% of its people are Muslims. It has resulted in a clash between those favouring the secular principles of the state, such as the Turkish Armed Forces, and religious conservatives as well as Islamists.
Document 2: Nuri Berköz: M. Nuri Berköz (1889–1975) "(Mehemmed Hacı İlyas Oğlu Sarıkerimli)" was an Ottoman/Turkish Army soldier. He was born in Shaki, Azerbaijan in 1889. After completing his primary education in the local Russian-Tatar School, (educational institutions which are considered to have contributed to the rise of modern Azerbaijani intelligentsia) his father decided to immigrate to Ottoman Turkey with his family in early twentieth century. Upon the death of his father a while after their arrival at Bursa, he and his younger brother Mahmud first enrolled with the Bursa Military Junior High School ("Bursa Askerî Rüştiyesi" ), then Bursa Military High School (today Işıklar Military Air Force High School, "").
Document 3: İzmir Atatürk Museum: The Izmir Atatürk Museum is a museum in İzmir, Turkey. Founded by Mustafa Kemal Atatürk, a Turkish army officer, revolutionary, and the first President of Turkey, the Izmir Atatürk Museum opened to the public on 11 September 1941, on the 19th anniversary of Atatürk’s arrival in Izmir. On 13 May 1988 it was officially named the Izmir Atatürk Museum, which it is called today.
Document 4: Fuat Bulca: Ahmet Fuat Bulca (1881 – September 14, 1962) was an officer of the Ottoman Army and Turkish Army and a Turkish politician. He was the one of the closest friend of Mustafa Kemal (Atatürk), as well as his classmate at the Monastir Military High School.
Document 5: Kuleli Military High School: Kuleli Military High School was the oldest military high school in Turkey, located in Çengelköy, Istanbul, on the Asian shore of the Bosphorus strait. It was founded on September 21, 1845, by Ottoman Sultan Abdülmecid I.
Document 6: Mustafa (film): Mustafa is a 2008 Turkish biographical documentary about Mustafa Kemal Atatürk, the founder and first president of the Republic of Turkey, which was written and directed by Can Dündar. The film, which controversially concentrates on Atatürk's personal life, is the first documentary covering Atatürk's life from his early years to his death. It was released on Republic Day, 2008, to coincide with the 85th anniversary of the foundation of the Turkish Republic.
Document 7: Salih Bozok: Salih Bozok (1881 – April 25, 1941) was an officer of the Ottoman Army, later the Turkish Army and a politician of the Republic of Turkey. He was the chief aide-de-camp of Mustafa Kemal (Atatürk), the founder of modern Turkey.
Document 8: Military career of Mustafa Kemal Atatürk: Mustafa Kemal Atatürk (1881 – 10 November 1938) was an army officer, revolutionary statesman, and founder of the Republic of Turkey as well as its first President. Mustafa Kemal Atatürk's military career explains his life between graduation from Ottoman War College in Istanbul as a lieutenant in 1905 to his resignation from the Ottoman Army on 8 July 1919, as well as his military leadership throughout the subsequent Turkish War of Independence (armistice 11 October 1922).
Document 9: Mehmed Ali Pasha (marshal): Müşir Mehmed Ali Pasha (November 18, 1827 – September 7, 1878) was a German-born Ottoman soldier. He was the grandfather of the Turkish statesman Ali Fuat Cebesoy, and the great-grandfather of famous poets Nâzım Hikmet and Oktay Rıfat Horozcu and the socialist activist, lawyer, and athlete Mehmet Ali Aybar.
Document 10: List of Mustafa Kemal Atatürk's awards: This is a comprehensive list of Mustafa Kemal Atatürk's awards, (1881 – 10 November 1938), who was an army officer, revolutionary statesman, and founder of the Republic of Turkey as well as its first President.
Document 11: Makbule Atadan: Makbule Atadan (1885 – January 18, 1956) was the sister of Mustafa Kemal Atatürk, the founder of the Republic of Turkey. She was the only one surviving sister of Atatürk, while the other four siblings died at early ages.
Document 12: Mustafa Kemal Atatürk: Mustafa Kemal Atatürk (] ; 19 May 1881  – 10 November 1938) was a Turkish army officer, revolutionary, and founder of the Republic of Turkey, serving as its first President from 1923 until his death in 1938. Ideologically a secularist and nationalist, his policies and theories became known as Kemalism.
Document 13: Mustafa Kemal University: Mustafa Kemal University (Turkish: "Mustafa Kemal Üniversitesi" ), abbreviated as MKU, is a public university established 1992 at Antakya, Hatay Province in southern Turkey. It is named after the founder of the Turkish Republic, Mustafa Kemal Atatürk.
Document 14: Gazi Mustafa Kemal Boulevard: Gazi Mustafa Kemal Boulevard, abbreviated as GMK Boulevard, is a major avenue in Mersin, Turkey. It is named after Mustafa Kemal Atatürk (1881-1938), the founder of Turkish Republic.
Document 15: Mehmet Fuat Köprülü: Mehmet Fuat Köprülü (December 5, 1890 – June 28, 1966), also known as Köprülüzade Mehmed Fuad, was a highly influential Turcologist, Professor Ordinarius, Minister of Foreign Affairs and Deputy Prime Minister of the Republic of Turkey. A descendent of the illustrious Köprülü family, whose influence in shaping Ottoman history between 1656 and 1683 surpassed even that of the House of Osman, Fuat Köprülü was a key figure in the intersection of scholarship and politics in early 20th century Turkey. As a historian and public intellectual, his books, articles, essays and poems forged a “canon of Turkish culture and national identity” that provided the newly formed Republic of Turkey with scholarly sources of Turkishness.
ground_truth: Mustafa Kemal Atatürk