Question:  "Bye Bye I Love You" was the Luxembourgish entry in the Eurovision Song Contest, in which year, the song is notable in the history of the Contest; it was the very first entry composed by Eurovision veteran Ralph Siegel, who would go on write 19 ESC entries throughout the 1970s, 1980s, 1990s and 2000s, 1 for Switzerland, that participated in the Eurovision Song Contest 58 times?

Context articles: Switzerland in the Eurovision Song Contest
Netherlands in the Eurovision Song Contest
Frei zu leben
Israel in the Junior Eurovision Song Contest
Serbia in the Eurovision Song Contest 2015
Kids Jury in the Junior Eurovision Song Contest
Portugal in the Junior Eurovision Song Contest
Ein bißchen Frieden
Luxembourg in the Eurovision Song Contest 1974
Bye Bye I Love You

Switzerland has participated in the Eurovision Song Contest 58 times since making its debut at the first contest in 1956 , missing only four contests, in 1995, 1999, 2001 and 2003.
 Switzerland hosted the first contest in 1956, and won it themselves.
 Switzerland won the contest again in 1988.
The Netherlands, presented in the contest as The Netherlands, has participated in the Eurovision Song Contest 58 times since making its debut as one of the seven countries competing in the very first contest in 1956.
 It has missed only four contests so far (1985, 1991, 1995 and 2002).
 The preselection process was often done through the "Nationaal Songfestival", with the winner qualifying to represent the Netherlands in the Eurovision Song Contest.
 The Netherlands has won the contest four times.
"Frei zu leben" (English translation: "Free to live") was the German entry in the Eurovision Song Contest 1990, performed in German by Chris Kempers and Daniel Kovac.
<br> The song was composed German Eurovision veteran Ralph Siegel with lyrics by Michael Kunze, this was Kunze's third Eurovision entry, he had previously written the lyrics to Silver Convention's "Telegram" in 1977 and Mary Roos's "Aufrecht geh'n" in 1984.
The participation of Israel in the Junior Eurovision Song Contest first began in Amsterdam, Netherlands, at the Junior Eurovision Song Contest 2012.
 Israel Broadcasting Authority (IBA) a member organisation of the European Broadcasting Union (EBU) were responsible for the selection process of their participation.
 The only representative to participate for the nation was Kids.il with the song "Let the Music Win", which finished in eighth place out of twelve participating entries, achieving a score of sixty-eight points.
 Israel withdrew from competing in the Junior Eurovision Song Contest in 2013, and also sat out of the 2014 and 2015 contests.
 However, following their success at the 2015 and 2016 Eurovision Song Contests, IBA expressed an interest in making a return to competing at Junior Eurovision.
 It was announced on the 28 September 2016 that Israel would indeed return to the contest in 2016, with their entrant being selected internally.
 As of Junior Eurovision 2016, Israel have awarded the most points to Armenia and the Netherlands , and received the most points from Ukraine .
Serbia participated in the Eurovision Song Contest 2015 with the song "Beauty Never Lies", written by Vladimir Graić and Charlie Mason.
 The song was performed by Bojana Stamenov.
 Serbian broadcaster Radio Television of Serbia (RTS) selected Vladimir Graić, the composer of the Eurovision Song Contest 2007 winning song "Molitva", to compose three candidate songs as potential Serbian entries for the 2015 contest in Vienna, Austria.
 Graić was also tasked with selecting the performers of these three entries, opting to selected two established Serbian artists, Bojana Stamenov and Aleksa Jelić, and one undiscovered talent, Danica Krstić, to perform the three entries.
 RTS held the national final "Odbrojavanje za Beč" where the song "Ceo svet je moj" performed by Bojana Stamenov emerged as the winner after topping both the votes of a jury panel and a public televote.
 The entry was later translated to English as "Beauty Never Lies" with lyrics written by Charlie Mason—the lyricist of Austria's Eurovision Song Contest 2014 winning song "Rise Like a Phoenix".
The use of a Kids' Jury in the Junior Eurovision Song Contest was first introduced at the Junior Eurovision Song Contest 2012, in Amsterdam, Netherlands, as part of a new voting system for the Junior Eurovision Song Contest following discussions between the European Broadcasting Union (EBU), KidsRights Foundation, and the Junior Eurovision Song Contest 2012 host broadcaster Algemene Vereniging Radio Omroep (AVRO).
 Three of the four spokespersons who announced the jury points at each annual contest were former winners of the Junior Eurovision Song Contest.
 As of 2016, the results of each country's Kids' Jury have been integrated with the adult jury to give out two sets of 1-8, 10, and 12 points per country.
The participation of Portugal in the Junior Eurovision Song Contest first began at the Junior Eurovision Song Contest in 2006 which took place in Bucharest, Romania.
 Rádio e Televisão de Portugal (RTP), a member of the European Broadcasting Union (EBU), were responsible for the selection process of their participation.
 Portugal used a national selection format, broadcasting a show entitled ""Festival da Canção Junior"", for their participation at the contests.
 This was a junior version of Festival da Canção, the national music competition organised by broadcaster RTP to choose the Portuguese entry for the Eurovision Song Contest.
 The first representative to participate for the nation at the 2006 contest was Pedro Madeira with the song "Deixa-me sentir", which finished in second-last place out of fifteen participating entries, achieving a score of twenty-two points.
 Portugal withdrew from competing in the Junior Eurovision Song Contest in 2008, and will return for the Junior Eurovision Song Contest 2017 in Tbilisi, Georgia.
"Ein bißchen Frieden" ("A Little Peace" in English) is a song in German, written by prolific German Eurovision-writing duo Ralph Siegel (music) and Bernd Meinunger (lyrics) for the Eurovision Song Contest 1982, held in Harrogate, England.
 It was performed by 17-year-old German high-school student Nicole, resulting in Germany's first win at the Eurovision Song Contest by a record margin of 161 points, setting a new record for the largest winning margin that lasted until the Eurovision Song Contest 1997.
 Despite this, Nicole's single is still the only Eurovision entry to top the sales charts in every territory it was released in.
Luxembourg was represented by English singer Ireen Sheer, with the song '"Bye Bye I Love You", at the 1974 Eurovision Song Contest, which took place on 6 April in Brighton, England.
 The song was chosen internally by broadcaster RTL, and is noted as the first Eurovision entry composed by the prolific Ralph Siegel.
 This was the first of three Eurovision appearances by Sheer.
"Bye Bye I Love You" was the Luxembourgish entry in the Eurovision Song Contest 1974, performed (despite the English of the title, although the title phrase is in that language) in French by German-British singer Ireen Sheer.
 The song is notable in the history of the Contest; it was the very first entry composed by Eurovision veteran Ralph Siegel, who would go on write 19 ESC entries throughout the 1970s, 1980s, 1990s and 2000s - 14 for Germany including 1982 winner "Ein bißchen Frieden", 3 for Luxembourg, 1 for Switzerland, Montenegro in 2009, The Social Network Song for San Marino in 2012 and most recently "Crisalide (Vola)" for San Marino in 2013.