paragraph_text: Nigeria is a Federal Republic modelled after the United States, with executive power exercised by the president. It is influenced by the Westminster System model[citation needed] in the composition and management of the upper and lower houses of the bicameral legislature. The president presides as both Head of State and head of the national executive; the leader is elected by popular vote to a maximum of two 4-year terms. In the March 28, 2015 presidential election, General Muhammadu Buhari emerged victorious to become the Federal President of Nigeria, defeating then incumbent Goodluck Jonathan.

paragraph_text: Turkey's application to accede to the European Economic Community, the predecessor of the European Union (EU), was made on 14 April 1987. After the ten founding members, Turkey was one of the first countries to become a member of the Council of Europe in 1949. The country has also been an associate member of the Western European Union from 1992 to its end in 2011. Turkey signed a Customs Union agreement with the EU in 1995 and was officially recognised as a candidate for full membership on 12 December 1999, at the Helsinki summit of the European Council.

paragraph_text: In a referendum on 23 June 2016, 51.9% of the participating UK electorate voted to leave the EU, out of a turnout of 72.2%. On 29 March 2017, the UK government invoked Article 50 of the Treaty on the European Union. The UK is thus due to leave the EU on 29 March 2019.

paragraph_text: Switzerland voted against membership in the European Economic Area in a referendum in December 1992 and has since maintained and developed its relationships with the European Union (EU) and European countries through bilateral agreements. In March 2001, the Swiss people refused in a popular vote to start accession negotiations with the EU. In recent years, the Swiss have brought their economic practices largely into conformity with those of the EU in many ways, in an effort to enhance their international competitiveness. The economy grew at 3% in 2010, 1.9% in 2011, and 1% in 2012. Full EU membership is a long-term objective of some in the Swiss government, but there is considerable popular sentiment against this supported by the conservative SVP party. The western French-speaking areas and the urban regions of the rest of the country tend to be more pro-EU, however with far from any significant share of the population.

paragraph_text: The Army Air Corps (AAC) is a component of the British Army, first formed in 1942 during the Second World War by grouping the various airborne units of the British Army (which are no longer part of the AAC). Today, there are eight regiments (7 Regular Army and 1 Reserve) of the AAC as well as four Independent Flights and two Independent Squadrons deployed in support of British Army operations across the world. They are located in Britain, Brunei, Canada, and Germany. Some AAC squadrons provide the offensive and air assault elements of 16 Air Assault Brigade through Joint Helicopter Command.

paragraph_text: The Voting Rights Act of 1965 is a landmark piece of federal legislation in the United States that prohibits racial discrimination in voting. It was signed into law by President Lyndon B. Johnson during the height of the Civil Rights Movement on August 6, 1965, and Congress later amended the Act five times to expand its protections. Designed to enforce the voting rights guaranteed by the Fourteenth and Fifteenth Amendments to the United States Constitution, the Act secured voting rights for racial minorities throughout the country, especially in the South. According to the U.S. Department of Justice, the Act is considered to be the most effective piece of federal civil rights legislation ever enacted in the country.

paragraph_text: Apache Forrest is a web-publishing framework based on Apache Cocoon. It is an XML single source publishing framework that allows multiple types of data-files as input, such as various popular word processing and spreadsheet files, as well as two wiki dialects. Plugins are available to support additional formats, both for input as well as output (such as PDF).

paragraph_text: The older 78 format continued to be mass-produced alongside the newer formats using new materials until about 1960 in the U.S., and in a few countries, such as India (where some Beatles recordings were issued on 78), into the 1960s. For example, Columbia Records' last reissue of Frank Sinatra songs on 78 rpm records was an album called Young at Heart, issued November 1, 1954. As late as the 1970s, some children's records were released at the 78 rpm speed. In the United Kingdom, the 78 rpm single lasted longer than in the United States and the 45 rpm took longer to become popular. The 78 rpm was overtaken in popularity by the 45 rpm in the late 1950s, as teenagers became increasingly affluent.

paragraph_text: Pojuschie Gitary ( , "The Singing Guitars") were the Soviet Union's first rock band to reach a phenomenal rate of success and popularity in the Soviet Union, Eastern Europe and in other countries. For that reason, they are often nicknamed "the Soviet Beatles" in a manner not that different from Hungary's Illés and Poland's Czerwone Gitary, whose name means "Red Guitars".

paragraph_text: The Beatles were an English rock band formed in Liverpool in 1960. With members John Lennon, Paul McCartney, George Harrison and Ringo Starr, they became widely regarded as the foremost and most influential act of the rock era. Rooted in skiffle, beat and 1950s rock and roll, the Beatles later experimented with several musical styles, ranging from pop ballads and Indian music to psychedelia and hard rock, often incorporating classical elements and unconventional recording techniques in innovative ways. In 1963 their enormous popularity first emerged as ``Beatlemania ''; as the group's music grew in sophistication, led by primary songwriters Lennon and McCartney, the band were integral to pop music's development into an art form and came to be perceived as an embodiment of the ideals shared by the counterculture of the 1960s.

paragraph_text: Turkey's application to accede to the European Economic Community, the predecessor of the European Union (EU), was made on 14 April 1987. After the ten founding members, Turkey was one of the first countries to become a member of the Council of Europe in 1949. The country was also an associate member of the Western European Union from 1992 to its end in 2011. Turkey signed a Customs Union agreement with the EU in 1995 and was officially recognised as a candidate for full membership on 12 December 1999, at the Helsinki summit of the European Council.

paragraph_text: Cannabis in California is permitted, subject to regulations, for both medical and recreational use. In recent decades the state has led the country in efforts to legalize cannabis, holding the first (unsuccessful) vote to decriminalize it in 1972 and, through Proposition 215, becoming the first state to legalize it for medical use in 1996. In the November 2016 election, voters passed an amendment legalizing recreational use of marijuana.

paragraph_text: Until recently, in the absence of prior agreement on a clear and precise definition, the concept was thought to mean (as a shorthand) 'a division of sovereignty between two levels of government'. New research, however, argues that this cannot be correct, as dividing sovereignty - when this concept is properly understood in its core meaning of the final and absolute source of political authority in a political community - is not possible. The descent of the United States into Civil War in the mid-nineteenth century, over disputes about unallocated competences concerning slavery and ultimately the right of secession, showed this. One or other level of government could be sovereign to decide such matters, but not both simultaneously. Therefore, it is now suggested that federalism is more appropriately conceived as 'a division of the powers flowing from sovereignty between two levels of government'. What differentiates the concept from other multi-level political forms is the characteristic of equality of standing between the two levels of government established. This clarified definition opens the way to identifying two distinct federal forms, where before only one was known, based upon whether sovereignty resides in the whole (in one people) or in the parts (in many peoples): the federal state (or federation) and the federal union of states (or federal union), respectively. Leading examples of the federal state include the United States, Germany, Canada, Switzerland, Australia and India. The leading example of the federal union of states is the European Union.

paragraph_text: The Battle of Apache Pass was fought in 1862 at Apache Pass, Arizona, in the United States, between Apache warriors and the Union volunteers of the California Column as it marched from California to capture Confederate Arizona and to reinforce New Mexico's Union army. It was one of the largest battles between the Americans and the Chiricahua during the Apache Wars.

paragraph_text: The Treaty Clause is part of Article II, Section 2, Clause 2, of the United States Constitution, that empowers the President of the United States to propose and chiefly negotiate agreements between the United States and other countries, which, upon receiving the advice and consent of a two - thirds supermajority vote of the United States Senate, become binding with the force of federal law.

paragraph_text: Similarly, the federal constitutional initiative allows citizens to put a constitutional amendment to a national vote, if 100,000 voters sign the proposed amendment within 18 months.[note 8] Parliament can supplement the proposed amendment with a counter-proposal, and then voters must indicate a preference on the ballot in case both proposals are accepted. Constitutional amendments, whether introduced by initiative or in Parliament, must be accepted by a double majority of the national popular vote and the cantonal popular votes.[note 9]

paragraph_text: The Voting Rights Act of 1965 is a landmark piece of federal legislation in the United States that prohibits racial discrimination in voting. It was signed into law by President Lyndon B. Johnson during the height of the Civil Rights Movement on August 6, 1965, and Congress later amended the Act five times to expand its protections. Designed to enforce the voting rights guaranteed by the Fourteenth and Fifteenth Amendments to the United States Constitution, the Act secured the right to vote for racial minorities throughout the country, especially in the South. According to the U.S. Department of Justice, the Act is considered to be the most effective piece of federal civil rights legislation ever enacted in the country.

paragraph_text: United Kingdom European Union membership referendum, 2016 Northern Ireland Choice Votes% Remain a member of the European Union 440,707 55.78% Leave the European Union 349,442 44.22% Valid votes 790,149 99.95% Invalid or blank votes 374 0.05% Total votes 790,523 100.00% Registered voters and turnout 1,260,955 62.69% Source: Electoral Commission

paragraph_text: Thus, while the rest of Europe saw revolutionary uprisings, the Swiss drew up a constitution which provided for a federal layout, much of it inspired by the American example. This constitution provided for a central authority while leaving the cantons the right to self-government on local issues. Giving credit to those who favoured the power of the cantons (the Sonderbund Kantone), the national assembly was divided between an upper house (the Council of States, two representatives per canton) and a lower house (the National Council, with representatives elected from across the country). Referenda were made mandatory for any amendment of this constitution.

paragraph_text: Switzerland joined the Council of Europe in 1963. In 1979 areas from the canton of Bern attained independence from the Bernese, forming the new canton of Jura. On 18 April 1999 the Swiss population and the cantons voted in favour of a completely revised federal constitution.In 2002 Switzerland became a full member of the United Nations, leaving the Vatican City as the last widely recognised state without full UN membership. Switzerland is a founding member of the EFTA, but is not a member of the European Economic Area. An application for membership in the European Union was sent in May 1992, but not advanced since the EEA was rejected in December 1992 when Switzerland was the only country to launch a referendum on the EEA. There have since been several referendums on the EU issue; due to opposition from the citizens, the membership application has been withdrawn. Nonetheless, Swiss law is gradually being adjusted to conform with that of the EU, and the government has signed a number of bilateral agreements with the European Union. Switzerland, together with Liechtenstein, has been completely surrounded by the EU since Austria's entry in 1995. On 5 June 2005, Swiss voters agreed by a 55% majority to join the Schengen treaty, a result that was regarded by EU commentators as a sign of support by Switzerland, a country that is traditionally perceived as independent and reluctant to enter supranational bodies.

Question: When did the Beatles become popular in the country where helicopters are based in the nation that recently voted to leave an example of a federal union?
Answer: 1963