Question: In 2017 who led the country where the manufacturer of the Triumph Roadster is located?

full_context: Document 1: Triumph TR2: The Triumph TR2 is a sports car produced by the Standard Motor Company in the United Kingdom between 1953 and 1955, during which time 8,636 cars were produced.
Document 2: Mini: By March 2000, Rover was still suffering massive losses, and BMW decided to dispose of most of the companies. The sell - off was completed in May that year. MG and Rover went to Phoenix, a new British consortium; and Land Rover was sold to Ford Motor Company. BMW retained the Mini name and the planned new model, granting Rover temporary rights to the brand and allowing it to manufacture and sell the run - out model of the old Mini. By April 2000, the range consisted of four versions: the Mini Classic Seven, the Mini Classic Cooper, the Mini Classic Cooper Sport and -- for overseas European markets -- the Mini Knightsbridge. The last Mini (a red Cooper Sport) was built on 4 October 2000 and presented to the British Motor Industry Heritage Trust in December of that year. A total of 5,387,862 cars had been manufactured, nearly 1.6 million of which were sold in Britain, although the majority of these were sold at least 20 years before the Mini's demise, meaning that the majority of those sold had been scrapped before the end of the original Mini's production life.
Document 3: Parliament of the United Kingdom: The House of Commons is a democratically elected chamber with elections held at least every five years. The two Houses meet in separate chambers in the Palace of Westminster (commonly known as the Houses of Parliament) in London. By constitutional convention, all government ministers, including the Prime Minister, are members of the House of Commons or, less commonly, the House of Lords and are thereby accountable to the respective branches of the legislature. Most cabinet ministers (Secretaries of State) are from the Commons, whilst junior ministers can be from either House. However, it should be noted the Leader of the House of Lords must be a peer and is a cabinet position, usually combined with a paid position.
Document 4: Triumph TR7: The Triumph TR7 is a sports car which was manufactured from September 1974 to October 1981 by the Specialist Division (latterly the "Jaguar-Rover-Triumph" division) of British Leyland in the United Kingdom. It was initially produced at the Speke, Liverpool factory, moving to Canley, Coventry in 1978 and then finally to the Rover Solihull plant in 1980. The car was launched in the United States in January 1975, with its UK home market debut in May 1976. The UK launch was delayed at least twice because of high demand for the vehicle in the US, with final sales of new TR7s continuing into 1982.
Document 5: Automotive industry in the United Kingdom: The origins of the UK automotive industry date back to the final years of the 19th century. By the 1950s the UK was the second - largest manufacturer of cars in the world (after the United States) and the largest exporter. However, in subsequent decades the industry experienced considerably lower growth than competitor nations such as France, Germany and Japan and by 2008 the UK was the 12th - largest producer of cars measured by volume. Since the early 1990s many British car marques have been acquired by foreign companies including BMW (Mini and Rolls - Royce), SAIC (MG), TATA (Jaguar and Land Rover) and Volkswagen Group (Bentley). Rights to many currently dormant marques, including Austin, Riley, Rover and Triumph, are also owned by foreign companies.
Document 6: Triumph Roadster: The Triumph Roadster is an automobile which was produced by Britain's Standard Motor Company from 1946 to 1949. It was first available as the Triumph 1800 Roadster (18TR) from 1946 to 1948 and then as the Triumph 2000 Roadster (TRA) from 1948 to 1949.
Document 7: Triumph Dolomite (1934–40): The Triumph Dolomite is a car that was produced by Triumph Motor Company from 1934 to 1940. It first appeared in 1934 as a sports car and the name was also used from 1937 on a series of sporting saloons and open cars until 1939 when the company went into receivership. A number were still sold and registered in 1940, though it is uncertain whether the receiver or new owner turned out cars from spare parts, or sold off completed cars. All except the Straight 8 featured a "waterfall" grille styled by Walter Belgrove, versions of the saloons with conventional grilles were sold as Continental models.
Document 8: Morris Light Reconnaissance Car: The Nuffield Group had been brought in to supplement production of light reconnaissance cars by Standard Motor Company (Beaverette) and Humber (Humber LAC, also known as "Humberette").
Document 9: Standard Ten: The Standard Ten was a model name given to several small cars produced by the British Standard Motor Company between 1906 and 1961. The name was a reference to the car's fiscal horsepower. Like other manufacturers, Standard continued to use the name to define the approximate size of their 'Ten' model long after the origins of the name had, in Britain, become inapplicable.
Document 10: Lister Motor Company: The Lister Motor Company Ltd. is a British sports car manufacturer founded by Brian Lister in 1954 in Cambridge, England, which became known for its involvement in motorsport. Sold in 1986, Laurence Pearce produced variants of the Jaguar XJS before producing a bespoke sports car, the Lister Storm. In 2013, Lister Cars was acquired by Lawrence Whittaker's company Warrantywise. Production of the original sports car restarted in 2014 and ten continuation Lister Jaguar Knobblys were built to celebrate Lister’s 60th Anniversary. In 2016, the company announced the build and sale of the Lister Knobbly Stirling Moss. On 31 January 2018, the Lister LFT-666 (previously called the Lister Thunder) based on the Jaguar F-Type was announced.
Document 11: Leader of the Conservative Party (UK): Leader of the Conservative Party Incumbent Theresa May since 11 July 2016 Inaugural holder Robert Peel (de facto) Bonar Law (de jure) Formation 1834 (de facto) 1922 (de jure)
Document 12: Range Rover Sport: The Range Rover Sport is a British luxury mid-size SUV made by Land Rover. The first generation (codename: L320) started production in 2004, and was replaced by the second generation Sport (codename: L494) in 2013.
Document 13: Government of the United Kingdom: The current prime minister is Theresa May, who took office on 13 July 2016. She is the leader of the Conservative Party, which won a majority of seats in the House of Commons in the general election on 7 May 2015, when David Cameron was the party leader; although at the last general election she failed to secure a majority government. Prior to this, Cameron and the Conservatives led a coalition from 2010 to 2015 with the Liberal Democrats, in which Cameron was prime minister.
Document 14: Prime Minister of the United Kingdom: The Prime Minister of the United Kingdom is the head of Her Majesty's Government in the United Kingdom. The Prime Minister (informally abbreviated to PM) and Cabinet (consisting of all the most senior ministers, most of whom are government department heads) are collectively accountable for their policies and actions to the Monarch, to Parliament, to their political party and ultimately to the electorate. The office is one of the Great Offices of State. The current holder of the office, Theresa May, leader of the Conservative Party, was appointed by the Queen on 13 July 2016.
Document 15: Prime Minister of the United Kingdom: Prime Minister of the United Kingdom of Great Britain and Northern Ireland Royal Arms used by Her Majesty's Government Incumbent Theresa May since 13 July 2016 (2016 - 07 - 13) Government of the United Kingdom Office of the Prime Minister Style Prime Minister (informal) The Right Honourable (within the UK and the Commonwealth) His / Her Excellency (in international correspondence) Member of Cabinet Privy Council European Council British -- Irish Council Reports to Parliament Residence 10 Downing Street Chequers Seat Westminster Appointer Monarch of the United Kingdom Term length At Her Majesty's pleasure Inaugural holder Sir Robert Walpole as First Lord of the Treasury and de facto first Prime Minister. Formation 4 April 1721 Salary £151,451 annual, including £76,011 MP's salary Website Official website
ground_truth: Theresa May
sub_queries: Triumph Roadster >> manufacturer Answer: Standard Motor Company
Standard Motor Company >> country Answer: United Kingdom
who is the leader of United Kingdom 2017 Answer: Theresa May