Question: Who was the first prime minister of the country that released Kaya toast?

full_context: Document 1: Roti tissue: Roti tissue is available at most local Mamak stalls in Malaysia and Singapore and may be coated with sweet substances such as sugar and kaya (jam) or eaten with condiments such as ice cream.
Document 2: Kẹo dừa: Kẹo dừa is a Vietnamese cuisine coconut candy most commonly produced in Bến Tre province, Vietnam with coconut milk and coconut cream. The Ben Tre Province is nicknamed by Vietnamese as the "Land of Coconut" (Xu Dua). The Vietnamese term for coconut candy is "kẹo dừa", with kẹo = candy and dừa = coconut. Coconut candy was originally associated with Mo Cay, a small township within the Ben Tre province.
Document 3: 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 4: Kaya toast: Kaya toast is a well-known snack in Singapore and Malaysia. Kaya toast is prepared with kaya (coconut jam), a topping of sugar, coconut milk and eggs, pandan, and sometimes margarine or butter. Kaya is generally served on toast, and also sometimes on crackers. It is considered a breakfast staple, and remains popular in Singapore. The dish is sometimes dipped into soft-boiled egg with a little dark soy sauce and white pepper.
Document 5: 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 6: 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 7: Bánh chuối: Bánh chuối (literally "banana cake") is a sweet banana cake or bread pudding from Vietnam. Although its exact ingredients may vary, it is usually made with ripe bananas or plantains, coconut milk, sugar, white bread, shredded young coconut, condensed milk, butter, egg, and vanilla extract. In the finished dish, the cooked banana often appears purplish-red in color.
Document 8: Malu Mirisata: Malu Mirisata (spicy Sri Lankan fish curry) has more of a chili flavor and it’s a favorite method of cooking fish in Sri Lanka. The dish is popular around the country and mostly in seaboard area where fish and other seafood are staple foods. Coconut milk is used in some variations of this dish. This can be usually served with rice, bread or string hoppers.
Document 9: 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 10: 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 11: Prime Minister of Australia: Prime Minister of Australia Commonwealth Coat of Arms Incumbent Malcolm Turnbull since 15 September 2015 Government of Australia Department of the Prime Minister and Cabinet Style The Honourable (formal) Prime Minister (spoken) His / Her Excellency (in international correspondence) Member of Cabinet National Security Committee Federal Executive Council Reports to Parliament, Governor - General Residence The Lodge Kirribilli House Seat Canberra Appointer Governor - General of Australia by convention, based on appointee's ability to command confidence in the House of Representatives Term length At the Governor - General's pleasure contingent on the Prime Minister's ability to command confidence in the lower house of Parliament Inaugural holder Edmund Barton Formation 1 January 1901 Deputy Michael McCormack Salary $527,852 (AUD) Website pm.gov.au
Document 12: 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 13: 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 14: Myanmar: Mohinga is the traditional breakfast dish and is Myanmar's national dish. Seafood is a common ingredient in coastal cities such as Sittwe, Kyaukpyu, Mawlamyaing (formerly Moulmein), Mergui (Myeik) and Dawei, while meat and poultry are more commonly used in landlocked cities like Mandalay. Freshwater fish and shrimp have been incorporated into inland cooking as a primary source of protein and are used in a variety of ways, fresh, salted whole or filleted, salted and dried, made into a salty paste, or fermented sour and pressed.
Document 15: Soto ayam: Soto ayam is a yellow spicy chicken soup with "lontong" or "nasi himpit" or "ketupat" (all compressed rice that is then cut into small cakes) and/or vermicelli or noodles, it is from Indonesia, and popular in Singapore, Malaysia and Suriname. Turmeric is added as one of its ingredients to get yellow chicken broth. It is probably the most popular variant of "soto", a traditional soup commonly found in Indonesian cuisine. Besides chicken and vermicelli, it can also be served with hard-boiled eggs, slices of fried potatoes, Chinese celery leaves, and fried shallots. Coconut milk is sometimes used as an ingredient. Occasionally, people will add ""koya"", a powder of mixed prawn crackers with fried garlic or orange colored spicy sambal, "krupuk" or "emping" is a very common topping.
ground_truth: Lee Kuan Yew
sub_queries: What country released Kaya toast? Answer: Singapore
who is the first prime minister of Singapore Answer: Lee Kuan Yew