Question: In what year did the Uganda President's regime kill the first prime minister of Uganda?

Context paragraphs:
Naoto Kan: Naoto Kan (菅 直人 , Kan Naoto , born 10 October 1946) is a Japanese politician, and former Prime Minister of Japan.  In June 2010, then-Finance Minister Kan was elected as the leader of the Democratic Party of Japan (DPJ) and designated Prime Minister by the Diet to succeed Yukio Hatoyama.  Kan was the first Prime Minister of Japan since the resignation of Junichiro Koizumi in 2006 to serve for more than 1 year, with predecessors Yukio Hatoyama, Tarō Asō, Yasuo Fukuda, and Shinzō Abe either resigning prematurely or losing an election.  On 26 August 2011, Kan announced his resignation.  Yoshihiko Noda was formally appointed as Prime Minister on 2 September 2011.  On 1 August 2012, United Nations Secretary-General Ban Ki-moon announced Kan would be one of the members of the UN high-level panel on the post-2015 development agenda.

Idi Amin: Idi Amin Dada ( ;  1923 2816 August 2003) was a Ugandan political leader and military officer who was the President of Uganda from 1971 to 1979.

List of Prime Ministers of the United Kingdom: The Prime Minister of the United Kingdom is the head of the Government of the United Kingdom, and chairs Cabinet meetings.  There is no specific date when the office of Prime Minister first appeared, as the role was not created but rather evolved over a period of time.  The term was used in the House of Commons in 1805 and it was certainly in parliamentary use by the 1880s, and in 1905 the post of Prime Minister was officially given recognition in the order of precedence.  Modern historians generally consider Sir Robert Walpole, who led the government of Great Britain from 1721 to 1742, as the first Prime Minister.  Walpole is also the longest-serving Prime Minister by this definition.  However, Sir Henry Campbell-Bannerman was the first Prime Minister and Margaret Thatcher the longest-serving Prime Minister to have been officially referred to as such.

Penn Nouth: Samdech Penn Nouth (Khmer: សម្តេច ប៉ែន នុត , ] ) (April 1, 1906 – May 18, 1985) was a Cambodian politician.  He served in the French colonial administration, then took active part in Cambodian politics, was several times a Prime Minister of Cambodia (1953, 1954-1955, 1958, 1961) as part of the Sangkum regime of Prince Norodom Sihanouk.  He was the first prime minister of an independent Cambodia.  He was prime minister for the sixth time from 31 January 1968 to 14 August 1969.  On 18 March 1970, when Norodom Sihanouk was deposed by Lon Nol, Penn Nouth joined the monarch in his exile and became prime minister in the GRUNK coalition.

Prime Minister of Kenya: The Prime Minister of Kenya was a post in the Kenyan government.  The first Prime Minister of Kenya was Jomo Kenyatta who became Prime Minister in 1963.  In 1964, Kenya became a Republic; the post of Prime Minister was abolished and Jomo Kenyatta assumed the position of President.  Following a power-sharing agreement in February 2008, the post of Prime Minister was recreated that April.  The position was again abolished by the 2010 Constitution after the 2013 elections.

Swedish governmental line of succession: The Swedish constitution of 1974 allows the Prime Minister of Sweden to appoint one of the Ministers in the cabinet as Deputy Prime Minister ("biträdande statsminister", also unofficially known as "vice statsminister", "Vice Prime Minister"), in case the Prime Minister for some reason is prevented from performing his or her duties.  However, if a Deputy Prime Minister has not been appointed, the Minister in the cabinet who has served the longest time (and if there are several with equal experience the one who is oldest) takes over as head of government.  Note that the person acting as Prime Minister does not do so on a permanent basis: if a Prime Minister dies, resigns or loses a vote of confidence in the Riksdag, the Speaker of the Riksdag will then confer with the parties of the Riksdag and propose a new Prime Minister, who must be tolerated by a majority of the Riksdag.  If the Prime Minister has resigned or lost a vote of confidence, he or she will remain the head of a government "ad interim" until the new Prime Minister assumes his or her office.  The only case where the governmental line of succession becomes relevant is when the Prime Minister dies (upon which the person next in the line of succession serves as the head of a government "ad interim") or when the Prime Minister is on leave or for any other reason incapable of serving, but still remains in office.  This might be compared to the Presidential line of succession in the United States, where the person next in line assumes the Presidency throughout the remainder of the term if the President dies, resigns or is impeached.

Ruwan Wijewardene: Born to a political dynasty, he is the youngest son of Ranjani Senanayake and Ranjith Wijewardene (Chairman of Wijeya Newspapers).  His maternal great grandfather, Rt Hon D.S Senanayake, was the first prime minister of Ceylon and his grand uncle, Dudley Senanayake, was the second prime minister of Ceylon and went on to become prime minister two more times during the 1950s and 1960s.  His paternal grandfather, D. R. Wijewardena, was a press baron who was a leader in the Sri Lankan independence movement.  A successful entrepreneur, he established Lake House newspapers and played a major role in the independence movement.  Ruwan Wijewardene is a nephew of the first executive president J.R. Jayewardene of Sri Lanka and a cousin of Ranil Wickremesinghe, the Prime Minister of Sri Lanka.

Benedicto Kiwanuka: Benedicto Kagimu Mugumba Kiwanuka (8 May 1922 – 22 September 1972) was the first prime minister of Uganda, a leader of the Democratic Party, and one of the persons that led the country in the transition between colonial British rule and independence.  He was murdered by Idi Amin's regime in 1972.

Julius Oketta: Major General Julius Facki Oketta (3 October 1956 – 5 November 2016) was a military officer in Uganda.  He was a senior commander in the Uganda People's Defence Force (UPDF).  Before his death, he served as the "Director of National Emergency Coordination and Operations", in the Office of the Prime Minister of Uganda.  In October 2013, the President of Uganda nominated and the Secretary General of the United Nations endorsed General Oketta to join the advisory group of the United Nations (UN) Central Emergency Response Fund (CERF).  In 2004, at the rank of Brigadier, he was a member of the pioneer class to attend the Uganda Senor Command and Staff College, at Kimaka, Jinja, Eastern Uganda, under its first Commandant, Lieutenant General Ivan Koreta.  Oketta died in the early morning hours on 5 November 2016.

Rowsch Shaways: Rowsch Nuri Shaways (Kurdish رۆژ نووری شاوەیس; Arabic روز نورى شاويس) is a Kurdish politician who served as the first Prime Minister of the KDP-controlled part of Kurdistan.  After the invasion of Iraq that overthrew the Saddam Hussein regime, he served as one of Iraq's two vice presidents in the interim government established in 2004.  Subsequently, he was a Deputy Prime Minister in the government headed by Ibrahim al-Jaafari and later held the same post under Nouri al-Maliki.  He also served as Depty Prime Minister under Haider Al-Abadi from 8 September 2014 to 9 August 2015.

Supporting paragraphs: Benedicto Kiwanuka Idi Amin
Answer: 1972