Question: What is the rate of interreligious marriage in the country that the sandwich, named for the successor of the National Rail, is from?

full_context: Document 1: Railtrack: Railtrack was a group of companies that owned the track, signalling, tunnels, bridges, level crossings and all but a handful of the stations of the British railway system from 1994 until 2002. It was created as part of the privatisation of British Rail, listed on the London Stock Exchange, and was a constituent of the FTSE 100 Index. In 2002, after experiencing major financial difficulty, most of Railtrack's operations were transferred to the state-controlled non-profit company Network Rail. The remainder of Railtrack was renamed RT Group plc and eventually dissolved on 22 June 2010.
Document 2: The Sun (United Kingdom): Despite its initial opposition to the closures, until 1997, the newspaper repeatedly called for the implementation of further Thatcherite policies, such as Royal Mail privatisation,[verification needed] and social security cutbacks, with leaders such as "Peter Lilley is right, we can't carry on like this",[verification needed] The paper showed hostility to the EU and approval of public spending cuts, tax cuts, and promotion of right-wing ministers to the cabinet, with leaders such as "More of the Redwood, not Deadwood".
Document 3: Jews: More than half of the Jews live in the Diaspora (see Population table). Currently, the largest Jewish community outside Israel, and either the largest or second-largest Jewish community in the world, is located in the United States, with 5.2 million to 6.4 million Jews by various estimates. Elsewhere in the Americas, there are also large Jewish populations in Canada (315,000), Argentina (180,000-300,000), and Brazil (196,000-600,000), and smaller populations in Mexico, Uruguay, Venezuela, Chile, Colombia and several other countries (see History of the Jews in Latin America). Demographers disagree on whether the United States has a larger Jewish population than Israel, with many maintaining that Israel surpassed the United States in Jewish population during the 2000s, while others maintain that the United States still has the largest Jewish population in the world. Currently, a major national Jewish population survey is planned to ascertain whether or not Israel has overtaken the United States in Jewish population.
Document 4: Jews: Rates of interreligious marriage vary widely: In the United States, it is just under 50%, in the United Kingdom, around 53%; in France; around 30%, and in Australia and Mexico, as low as 10%. In the United States, only about a third of children from intermarriages affiliate with Jewish religious practice. The result is that most countries in the Diaspora have steady or slightly declining religiously Jewish populations as Jews continue to assimilate into the countries in which they live.[citation needed]
Document 5: London Passenger Transport Board: The London Passenger Transport Board (LPTB) was the organisation responsible for local public transport in London and its environs from 1933 to 1948. In common with all London transport authorities from 1933 to 2000, the public name and brand was London Transport.
Document 6: Israel: Israel was established as a homeland for the Jewish people and is often referred to as a Jewish state. The country's Law of Return grants all Jews and those of Jewish ancestry the right to Israeli citizenship. Over three quarters, or 75.5%, of the population are Jews from a diversity of Jewish backgrounds. Around 4% of Israelis (300,000), ethnically defined as "others", are Russian descendants of Jewish origin or family who are not Jewish according to rabbinical law, but were eligible for Israeli citizenship under the Law of Return. Approximately 75% of Israeli Jews are born in Israel, 17% are immigrants from Europe and the Americas, and 8% are immigrants from Asia and Africa (including the Arab World). Jews from Europe and the former Soviet Union and their descendants born in Israel, including Ashkenazi Jews, constitute approximately 50% of Jewish Israelis. Jews who left or fled Arab and Muslim countries and their descendants, including both Mizrahi and Sephardi Jews, form most of the rest of the Jewish population. Jewish intermarriage rates run at over 35% and recent studies suggest that the percentage of Israelis descended from both Sephardi and Ashkenazi Jews increases by 0.5 percent every year, with over 25% of school children now originating from both communities.
Document 7: APTIS: APTIS was the Accountancy and Passenger Ticket Issuing System used on the British Rail/National Rail until 2007. It was originally called "Advanced Passenger Ticket Issuing System" as it was being developed at the time of the Advanced Passenger Train.
Document 8: British Rail sandwich: The British Rail sandwich has been used as a negative point of comparison for other ready-to-serve meals, especially regarding transportation in the United Kingdom, and representative of the negative effects of British nationalisation of industry in the middle of the 20th century. A 1997 article in "The Independent" referred to the sandwich as "an indictment of statist, bureaucratic corporations" privatised by Prime Minister Margaret Thatcher, who had "swept aside James Callaghan, prices and incomes policies and the British Rail sandwich".
Document 9: Railtrack: Railtrack was a group of companies that owned the track, signalling, tunnels, bridges, level crossings and all but a handful of the stations of the British railway system from 1994 until 2002. It was created as part of the privatisation of British Rail, listed on the London Stock Exchange, and was a constituent of the FTSE 100 Index. In 2002, after experiencing major financial difficulty, most of Railtrack's operations were transferred to the state - controlled non-profit company Network Rail. The remainder of Railtrack was renamed RT Group plc and eventually dissolved on 22 June 2010.
Document 10: Jews: Ashkenazi Jews represent the bulk of modern Jewry, with at least 70% of Jews worldwide (and up to 90% prior to World War II and the Holocaust). As a result of their emigration from Europe, Ashkenazim also represent the overwhelming majority of Jews in the New World continents, in countries such as the United States, Canada, Argentina, Australia, and Brazil. In France, the immigration of Jews from Algeria (Sephardim) has led them to outnumber the Ashkenazim. Only in Israel is the Jewish population representative of all groups, a melting pot independent of each group's proportion within the overall world Jewish population.
Document 11: Jews: Western Europe's largest Jewish community, and the third-largest Jewish community in the world, can be found in France, home to between 483,000 and 500,000 Jews, the majority of whom are immigrants or refugees from North African Arab countries such as Algeria, Morocco, and Tunisia (or their descendants). The United Kingdom has a Jewish community of 292,000. In Eastern Europe, there are anywhere from 350,000 to one million Jews living in the former Soviet Union, but exact figures are difficult to establish. In Germany, the 102,000 Jews registered with the Jewish community are a slowly declining population, despite the immigration of tens of thousands of Jews from the former Soviet Union since the fall of the Berlin Wall. Thousands of Israelis also live in Germany, either permanently or temporarily, for economic reasons.
Document 12: British Railways Board: The British Railways Board (BRB) was a nationalised industry in the United Kingdom that operated from 1963 to 2001. Until 1997 it was responsible for most railway services in Great Britain, trading under the brand name British Railways and, from 1965, British Rail. It did not operate railways in Northern Ireland, where railways were the responsibility of the Government of Northern Ireland.
Document 13: BusPlus: BusPlus is the payment method for the GSP Belgrade, Belgrade tram system, Lasta Beograd (only in public transport in Belgrade) and BG TRAIN. It is a thin, plastic card on which the customer electronically loads fares. The BusPlus is managed by company Apex Technology Solutions. Public authorities state that BusPlus was implemented to increase the revenue of the public transit authority and to improve the public transport system by getting better information on usage. Reports from September 2012 have indicated that the overall revenue has increased, but some aspects of integration have been criticized by public. System is installed by Kentkart, an automatic fare collection system integrator company.
Document 14: 1973 oil crisis: Despite being relatively unaffected by the embargo, the UK nonetheless faced an oil crisis of its own - a series of strikes by coal miners and railroad workers over the winter of 1973–74 became a major factor in the change of government. Heath asked the British to heat only one room in their houses over the winter. The UK, Germany, Italy, Switzerland and Norway banned flying, driving and boating on Sundays. Sweden rationed gasoline and heating oil. The Netherlands imposed prison sentences for those who used more than their ration of electricity.
Document 15: Pub: Quality dropped but variety increased with the introduction of microwave ovens and freezer food. "Pub grub" expanded to include British food items such as steak and ale pie, shepherd's pie, fish and chips, bangers and mash, Sunday roast, ploughman's lunch, and pasties. In addition, dishes such as burgers, chicken wings, lasagne and chilli con carne are often served. Some pubs offer elaborate hot and cold snacks free to customers at Sunday lunchtimes, to prevent them getting hungry and leaving for their lunch at home.
ground_truth: 53%
sub_queries: National Rail >> follows Answer: British Rail
What is the country British Rail sandwich is from? Answer: United Kingdom
What is the rate of interreligious marriage in United Kingdom ? Answer: 53%