Question: Who is the first prime minister of the country where CIS 50MG originated?

full_context: Document 1: STK 40 AGL: The STK 40 AGL, formerly the CIS 40 AGL is a 40 mm automatic grenade launcher, developed in the late 1980s and produced by the Singaporean defence firm − Chartered Industries of Singapore (CIS, now ST Kinetics). The launcher is employed primarily by the Singapore Armed Forces and the police and security forces of several other countries.
Document 2: Leader of the Opposition (Singapore): The Leader of the Opposition of Singapore is usually the leader of the second largest political party represented in the Parliament of Singapore. During the 1955 Legislative Assembly election, the late Lee Kuan Yew was the "de facto" Leader of the Opposition, as the People's Action Party was then the second largest political party represented in the Legislative Assembly.
Document 3: Prime Minister of Canada: Prime Minister of Canada Logo of the Prime Minister of Canada Incumbent Justin Trudeau since November 4, 2015 Executive Branch of the Government of Canada Office of the Prime Minister Style The Right Honourable (formal) Prime Minister (informal) His Excellency (diplomatic) Abbreviation PM Member of Queen's Privy Council Cabinet Parliament Reports to Monarch Governor General Parliament Residence 24 Sussex Drive (under renovation) Harrington Lake (seasonal) Rideau Cottage (temporary) Seat 80 Wellington St, Ottawa, ON K1P 5K9 Appointer Governor General Term length At Her Majesty's pleasure Constituting instrument None (constitutional convention) Inaugural holder Sir John A. Macdonald Formation July 1, 1867 Deputy Deputy Prime Minister of Canada (vacant) Salary $347,400 CAD (2018) Website www.pm.gc.ca
Document 4: SAR 21: The SAR 21 ("Singapore Assault Rifle - 21st Century") is a bullpup assault rifle designed and manufactured in Singapore. First revealed and subsequently adopted by the Singapore Armed Forces (SAF) in 1999, it was designed and developed over a four-year period and was intended to replace the locally license-built M16S1 by the Ministry of Defence (MINDEF), Singapore Army and the Chartered Industries of Singapore (CIS, now ST Kinetics). Many of its design features are directly intended to counter the weaknesses of the M16S1 as encountered operationally by some infantrymen.
Document 5: Goh Chok Tong: Goh Chok Tong (born 20 May 1941; Chinese: 吴作栋; Pe̍h-ōe-jī: Gô͘ Chok-tòng) is a Singaporean politician. A member of the People's Action Party (PAP), he became Singapore's second Prime Minister on 28 November 1990, succeeding Lee Kuan Yew, and served in the role until 12 August 2004, when he stepped down and was succeeded by Lee Hsien Loong. He subsequently served as Senior Minister until May 2011, and as Chairman of the Monetary Authority of Singapore (MAS). He continues to serve as a Member of Parliament (MP) representing the Marine Parade Group Representation Constituency and holds the honorary title of "Emeritus Senior Minister". Recently, in November 2018, he released his autobiography, Tall Order: The Goh Chok Tong Story which would be the first volume of a two-part biography.
Document 6: Ultimax 100: The Ultimax 100 is a Singapore-made 5.56mm light machine gun, developed by the Chartered Industries of Singapore (CIS, now ST Kinetics) by a team of engineers under the guidance of American firearms designer L. James Sullivan. The weapon is extremely accurate due to its constant-recoil operating system. It is considered one of the most lightweight machine guns in the world.
Document 7: Prime Minister of South Korea: Prime Minister of the Republic of Korea 대한민국국무총리 Prime ministerial standard Prime ministerial emblem Incumbent Lee Nak - yeon since 31 May 2017 Style Prime Minister (총리님) (informal) Member of State Council National Security Council Appointer President of South Korea (Subject to the National Assembly's approval) Term length No fixed term Constituting instrument Constitution of South Korea Inaugural holder Lee Beom - seok Formation July 31, 1948; 69 years ago (1948 - 07 - 31) Website (in English) pmo.go.kr/ (in Korean) pmo.go.kr/
Document 8: Prime Minister of Singapore: Prime Minister of the Republic of Singapore (show) Perdana Menteri Republik Singapura (Malay) 新加坡共和国总理 (Chinese) சிங்கப்பூர் குடியரசின் பிரதமர் (Tamil) Prime Minister's Crest Incumbent Lee Hsien Loong, MP since 12 August 2004 Style The Honourable Residence Sri Temasek Appointer President of the Republic of Singapore Term length 5 years or earlier, renewable. The Parliament of Singapore must be dissolved every 5 years or earlier by the Prime Minister. The leader of the majority party in the parliament will become the Prime Minister. Inaugural holder Lee Kuan Yew Formation 3 June 1959 Salary S $2.2 million annually Website www.pmo.gov.sg
Document 9: DShK: In addition to the Soviet Union and Russia, the DShK has been manufactured under license by a number of countries, including the People's Republic of China (Type 54), Pakistan, and Romania. Currently, it has been mostly replaced in favour of the more modern NSV and Kord designs. Nevertheless, the DShK is still one of the most widely used heavy machine guns.
Document 10: STK 50MG: The STK 50 MG, formerly known as the CIS 50MG, is a gas-operated, air-cooled, belt-fed heavy machine gun developed and manufactured by Chartered Industries of Singapore (CIS, now ST Kinetics) in the late 1980s, in response to a request by the Singaporean Defence Ministry to replace the 12.7mm Browning M2HB machine guns then in ubiquitous service with the Singapore Armed Forces (SAF).
Document 11: The Istana: The Istana is the official residence and office of the President of Singapore. Meaning "palace" in Malay, it is where the President receives and entertains state guests. The Istana is also the working office of the Prime Minister of Singapore.
Document 12: Prime Minister of India: Prime Minister of the Government of India State Emblem of India Flag of India Incumbent Narendra Modi since 26 May 2014 (2014 - 05 - 26) Prime Minister's Office Style The Honourable (formal) His Excellency (in diplomatic correspondence) Status Head of government Abbreviation PM Member of Cabinet, parliament Residence 7, Lok Kalyan Marg, New Delhi Seat Prime Minister's Office, South Block, New Delhi Appointer President of India by convention, based on appointee's ability to command confidence in the Lok Sabha Term length At the pleasure of the president Lok Sabha term is 5 years unless dissolved sooner No term limits specified Inaugural holder Jawaharlal Nehru (1947 - 1964) Formation 15 August 1947; 70 years ago (1947 - 08 - 15) Deputy Deputy Prime Minister of India (if any) Salary ₹20 lakh (US $31,000) (annual, including ₹960,000 (US $15,000) MP's salary) Website pmindia.gov.in
Document 13: Colt Machine Gun: The Colt Machine Gun or CMG was an open bolt belt-fed machine gun that fires 5.56×45mm cartridges designed by Colt Manufacturing Company in 1965. Colt hastily developed the CMG-1 to complement the CAR-15, a Colt branding of the M16 rifle, so that Colt might offer both of them as an alternative to the Stoner 63 weapons system. It failed to achieve any sales, and was replaced by the Colt CMG-2, which also failed to achieve any sales. The CMG-3 was a 7.62×51mm NATO version that failed as well.
Document 14: Heavy machine gun: There were thus two main types of heavy, rapid-fire weapons: the manually powered, multiple-barrel machine guns and the single-barrel Maxim guns. By the end of the 19th century, many new designs such as the M1895 Colt–Browning and Hotchkiss were developed, powered by gas operation or recoil operation.  Also, rather than the heavy water jacket, new designs introduced other types of barrel cooling, such as barrel replacement, metal fins, heat sinks or some combination of these.
Document 15: SR 88: The SR 88 (Singapore Rifle 88) is an assault rifle designed and manufactured in Singapore by Chartered Industries of Singapore (CIS, now ST Kinetics).
ground_truth: Lee Kuan Yew
sub_queries: What country did CIS 50MG originate? Answer: Singapore
who is the first prime minister of Singapore Answer: Lee Kuan Yew