Context: Londinium was a settlement established on the current site of the City of London around  43. Its bridge over the River Thames turned the city into a road nexus and major port, serving as a major commercial centre in Roman Britain until its abandonment during the 5th century., The Daily Telegraph, commonly referred to simply as The Telegraph, is a national British daily broadsheet newspaper published in London by Telegraph Media Group and distributed across the United Kingdom and internationally. It was founded by Arthur B. Sleigh in 1855 as "The Daily Telegraph and Courier"., Surrey is a county in the south east of England and also one of the home counties bordering Greater London. Surrey shares borders with Kent to the east, East Sussex to the south-east, West Sussex to the south, Hampshire to the west and south-west and Berkshire to the north-west. The county town is Guildford. Surrey County Council sits extraterritorially at Kingston upon Thames, administered as part of Greater London since 1965. With a resident population of 1.1 million, Surrey is the most densely populated and third most populated county in the South East region, after Kent and Hampshire., England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south; and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight., The Mayor of London is an elected politician who, along with the London Assembly of 25 members, is accountable for the strategic government of Greater London. The current mayor is Sadiq Khan, who took up office on 9 May 2016. The position had been held by Ken Livingstone from the creation of the role on 4 May 2000 until he was defeated in 2008 by Boris Johnson, who served two terms before being succeeded by Khan., Policy Exchange is a British centre - right think tank , created in 2002 and based in London . The Daily Telegraph has described it as `` the largest , but also the most influential think tank on the right '' . Policy Exchange has been addressed by members of the Labour Governments of Tony Blair ( 1997 - 2007 ) and Gordon Brown ( 2007 - 2010 ) , such as John Hutton , Peter Mandelson , Alan Milburn , David Lammy , Frank Field , Jim Murphy and Andrew Adonis , and by members of the Conservative - Liberal Democrat Coalition Government of David Cameron ( 2010 - 2015 ) , such as Chris Skidmore , Charlotte Leslie and Jesse Norman , as well as by many non party - political figures . The New Statesman named it as David Cameron 's `` favourite think tank '' , a view shared by the Political Editor of the Evening Standard Joe Murphy , who referred to it as `` the intellectual boot camp of the Tory modernisers '' '' . Its alumni include Anthony Browne , one of London Mayor Boris Johnson 's policy directors , and a number of the Conservative 2010 intake of MPs , including Nick Boles , Jesse Norman , Chris Skidmore and Charlotte Leslie . It describes itself as seeking localist , volunteer and free market solutions to public policy problems , with research programmes covering health , education , energy and environment , crime and justice , welfare , housing policy , family policy and security . It works with academics and policy advisors across the political spectrum , and members of its advisory councils include Lord Trimble , Peter Clarke , former Head of the Metropolitan Police Counter Terrorism Command , James Cameron , Executive Director of Climate Change Capital , and Simon Stevens , former health advisor to Tony Blair . Policy Exchange hosts regular events and debates with key individuals including academics , journalists , MPs and Ministers . The Annual Colin Cramphorn Memorial Lecture , has been delivered by speakers such as Sir Ian Blair , Charles Farr and General David Petraeus . Policy Exchange authors have included former government advisor Professor Dieter Helm , economist Robert Shiller , author and broadcaster Bill Bryson , historian and journalist Anna Reid , and former Financial Times journalist John Willman . Policy Exchange is a registered charity ., The River Thames is a river that flows through southern England. At , it is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn. It also flows through Oxford (where it is called Isis), Reading, Henley-on-Thames and Windsor. The lower reaches of the river are called the Tideway, derived from its long tidal reach up to Teddington Lock. It rises at Thames Head in Gloucestershire, and flows into the North Sea via the Thames Estuary. The Thames drains the whole of Greater London. , The European Union (EU) is a political and economic union of member states that are located primarily in Europe. It has an area of , and an estimated population of over 510 million. The EU has developed an internal single market through a standardised system of laws that apply in all member states. EU policies aim to ensure the free movement of people, goods, services, and capital within the internal market, enact legislation in justice and home affairs, and maintain common policies on trade, agriculture, fisheries, and regional development. Within the Schengen Area, passport controls have been abolished. A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency., The City of London is a city and county within London. It constituted most of London from its settlement by the Romans in the 1st century AD to the Middle Ages, but the agglomeration has since grown far beyond the City's borders. The City is now only a tiny part of the metropolis of London, though it remains a notable part of central London. Administratively, it forms one of the 33 local authority districts of Greater London; however, the City of London is not a London borough, a status reserved for the other 32 districts (including London's only other city, the City of Westminster). , The London Assembly is an elected body, part of the Greater London Authority, that scrutinises the activities of the Mayor of London and has the power, with a two-thirds majority, to amend the Mayor's annual budget and to reject the Mayor's draft statutory strategies. The assembly was established in 2000 and meets at City Hall on the South Bank of the River Thames, close to Tower Bridge. The assembly is also able to investigate other issues of importance to Londoners (transport, environmental matters, etc.), publish its findings and recommendations, and make proposals to the Mayor., Canada (French: ) is a country in the northern half of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering , making it the world's second-largest country by total area and the fourth-largest country by land area. Canada's border with the United States is the world's longest land border. The majority of the country has a cold or severely cold winter climate, but southerly areas are warm in summer. Canada is sparsely populated, the majority of its land territory being dominated by forest and tundra and the Rocky Mountains. About four-fifths of the country's population of 36 million people is urbanized and live near the southern border. Its capital is Ottawa, its largest city is Toronto; other major urban areas include Montreal, Vancouver, Calgary, Edmonton, Quebec City, Winnipeg and Hamilton., Colonel Arthur B. Sleigh, also known as Burrowes Willcocks Arthur Sleigh (1821, Montreal-1869, Chelsea) was a Canadian-born British army officer, travel writer and the original founder of the British newspaper "The Daily Telegraph"., The Telegraph Media Group (TMG, previously the Telegraph Group) is the proprietor of "The Daily Telegraph" and "The Sunday Telegraph". It is a subsidiary of Press Holdings. David and Frederick Barclay acquired the group in July 2004, after months of intense bidding and lawsuits, from Hollinger Inc. of Toronto, Ontario, Canada, the newspaper group controlled by the Canadian-born British businessman Conrad Black., Kent is a county in South East England and one of the home counties. It borders Greater London to the north west, Surrey to the west, East Sussex to the south west, and Essex across the Thames Estuary to the north. The county town is Maidstone. , Advocacy is an activity by an individual or group which aims to influence decisions within political, economic, and social systems and institutions. Advocacy can include many activities that a person or organization undertakes including media campaigns, public speaking, commissioning and publishing research or conducting exit poll or the filing of an amicus brief. Lobbying (often by lobby groups) is a form of advocacy where a direct approach is made to legislators on an issue which plays a significant role in modern politics. Research has started to address how advocacy groups in the United States and Canada are using social media to facilitate civic engagement and collective action., The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, it includes the island of Great Britain (the name of which is also loosely applied to the whole country), the north-eastern part of the island of Ireland, and many smaller islands. Northern Ireland is the only part of the UK that shares a land border with another sovereign statethe Republic of Ireland. Apart from this land border, the UK is surrounded by the Atlantic Ocean, with the North Sea to its east, the English Channel to its south and the Celtic Sea to its south-south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of , the UK is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants. Together, this makes it the fourth most densely populated country in the European Union., Middlesex (abbreviation: Middx) was a county in southeast England that is now mostly part of Greater London, with small sections in neighbouring counties. It was established in the Anglo-Saxon system from the territory of the Middle Saxons, and existed as an official unit until 1965. The historic county included land stretching north of the River Thames from east to west of the City of London with the rivers Colne and Lea and a ridge of hills as the other boundaries. The largely low-lying county, dominated by clay in its north and alluvium on gravel in its south, was the second smallest by area in 1831., A think tank, policy institute, or research institute is an organization that performs research and advocacy concerning topics such as social policy, political strategy, economics, military, technology, and culture. Most policy institutes are non-profit organizations, which some countries such as the United States and Canada provide with tax exempt status. Other think tanks are funded by governments, advocacy groups, or businesses, or derive revenue from consulting or research work related to their projects., London is the capital and most populous city of England and the United Kingdom, as well as the most populous city proper in the European Union. Standing on the River Thames in the south east of the island of Great Britain, London has been a major settlement for two millennia. It was founded by the Romans, who named it "Londinium". London's ancient core, the City of London, largely retains its medieval boundaries. Since at least the 19th century, "London" has also referred to the metropolis around this core, historically split between Middlesex, Essex, Surrey, Kent, and Hertfordshire, which today largely makes up Greater London, governed by the Mayor of London and the London Assembly., Hertfordshire (often abbreviated Herts) is a county in southern England, bordered by Bedfordshire to the north, Cambridgeshire to the north-east, Essex to the east, Buckinghamshire to the west and Greater London to the south. For government statistical purposes, it is placed in the East of England region., Great Britain, also known as Britain , is a large island in the north Atlantic Ocean off the northwest coast of continental Europe. With an area of , Great Britain is the largest European island and the ninth-largest in the world. In 2011 the island had a population of about 61 million people, making it the world's third-most populous island after Java in Indonesia and Honshu in Japan. The island of Ireland is situated to the west of it, and together these islands, along with over 1,000 smaller surrounding islands, comprise the British Isles archipelago., Subject: policy exchange, Relation: headquarters_location, Options: (A) address (B) calgary (C) canada (D) central (E) central london (F) chelsea (G) city of westminster (H) east sussex (I) edmonton (J) england (K) europe (L) forest (M) great britain (N) greater london (O) hampshire (P) hertfordshire (Q) ireland (R) isles of scilly (S) kent (T) kingston (U) london (V) media (W) middlesex (X) montreal (Y) quebec (Z) quebec city ([) scotland (\) south bank (]) south east england (^) surrey (_) toronto (`) united kingdom (a) wales (b) west sussex (c) westminster (d) windsor
Output: westminster