Question: What year was the boy band, who released "Our Twenty For," formed?

Context articles: Winner (band)
Titanium (band)
KO One (soundtrack)
Magneto (band)
Electrophonic Revolution
Our Twenty For
One (band)
B3 (band)
SMAP discography
CNCO

Winner (Hangul: 위너), often stylized as WINNER, is a South Korean boy group formed in 2013 by YG Entertainment and debuted in 2014.
 It currently consists of four members, Jinwoo, Seunghoon, Mino and Seungyoon.
 Originally a five-piece group with Taehyun, who later departed from the group in November 2016.
Titanium is a New Zealand pop boy band formed in Auckland in 2012 from the winners of "The Edge" radio station's competition to create New Zealand's second boy band.
 The Edge radio station hosted auditions across New Zealand and eventually six young men were selected for the group consisting of members, Zac Taylor, Andrew Papas, Jordi Webber, Shaquille Paranihi-Ngauma, Haydn Linsley and T.K Paradza.
 They released their debut single, "Come On Home".
 The single debuted at number one on the official New Zealand Singles Chart on 17 September 2012.
KO One Original Soundtrack () is the soundtrack for the 2005/2006 Taiwanese drama, "KO One", starring Aaron Yan, Calvin Chen, and Jiro Wang of Taiwanese boy band, Fahrenheit and Danson Tang.
 It was released by HIM International Music on 27 December 2005.
 The album included song by the then newly formed Taiwanese boy band Fahrenheit and also brought fame to Taiwanese artist, Tank who wrote and sang the opening and ending theme songs.
 The album was the best selling soundtrack in 2006, selling more than 60,000 copies in Taiwan within the first month.
Magneto was a popular Mexican boy band of the 1980s and 1990s.
 The band formed on February 14, 1983.
 In 1986, Magneto was featured in "Siempre en Domingo," a Mexican entertainment show viewed across Latin America and parts of Europe.
 Mexican teen pop group Magneto emerged in 1983.
 Their first record, Dejalo Que Gire came in 1984, followed by Super 6 Magneto.
 The Latin pop outfit suffered several lineup changes before achieving their first gold record in 1986.
 Mostly playing dance-pop songs, the five-member ensemble started touring Central America after climbing charts with "Todo Esta Muy Bien," and "Soy Un Soñador."
 However, their breakthrough came after issuing a Spanish-language version of Desireless' "Voyage Voyage," a French pop hit from the '80s.
 In 1992 the boy band played the lead in their own movie, "Cambiando el Destino".
 Magneto won the Lo Nuestro Award for Pop New Artist of the Year, and received two nominations for the Lo Nuestro Awards of 1993: Pop Album ("Magneto") and Pop Group of the Year.
 Nevertheless, the original Magneto disbanded in 1996 after a sold-out show at Mexico City's Auditorio Nacional.
Electrophonic Revolution is the debut and only studio album released by English-Irish boy band Phixx, formed from the five runners-up of the ITV reality television series "" who failed to make it into the boy band One True Voice.
 It was released in the United Kingdom on 1 November 2004, but despite the four singles from the album—"Hold on Me", "Love Revolution", "Wild Boys" and "Strange Love"—all making the Top 20, the album failed to chart.
 Just after the release of "Wild Boys", Peter Smith left the band to pursue a solo career and to give him more time to write music.
Our Twenty For is the second single album by South Korean boy group Winner.
 It's their second comeback in 2017, after releasing their first single album "Fate Number For" in April, and the second in a series of music releases related to the number four.
 The single symbolizes Winner's youth, passion, and special friendship.
 It also symbolizes the average age of Winner members at 24 and their youth.
ONE was a boy band that first appeared in 1999, recognized as both Greece and Cyprus's very first boy band.
 The band was formed by leading Cypriot-Greek composer Giorgos Theofanous and Minos EMI A&R Manager Vangelis Yannopoulos.
 Constantinos Christoforou and Phiippos Constantinos were on board quite early, chosen by Giorgos Theofanous.
 The next three members were picked up after a selective audition that took place in legendary Athenian Sierra Studio.
 The selecting committee consisted of Natalia Germanou, Posidonas Yannopoulos, Andreas Kouris, Themis Georgandas, Theofanous and Yannopoulos.
 Demetres Koutsavlakis, Argyris Nastopoulos and Panos Tserpes were retained among 179 candidates.
 Christoforou followed a solo career in 2003, and was replaced by another Cypriot singer, Demos Beke.
 In 2005 the band formally disbanded.
 In their 6-year existence they enjoyed much commercial success and earned platinum certifications, as well as having staged memorable performances with successful Greek singers at music halls and in concerts.
B3 was an American pop boy band from New York City.
 They were formed in 2001 and were first produced by O-Jay of German dance band Real McCoy.
 Original members were Timothy Andrew Cruz (2001–2004), John Steven Sutherland (2001–2004) and Rod Michael (2001–2002).
 When Michael left in 2002, Blair Madison Late (2002–2004) joined in.
 Tim Cruz was previously, in the late 1990s, a member of the boy band React.
The discography of Japanese boy band SMAP consists of 21 studio albums, 5 compilation albums, 23 video albums, and numerous singles.
 Sports Music Assemble People, abbreviated as SMAP, was formed in 1988 by a group of backup dancers for the boy band Hikaru Genji of Johnny & Associates.
 The band's initial releases performed poorly on the charts, but the following ones started gaining attention, aided by the group's appearance on their own variety show, "SMAP×SMAP".
 Their 2003 single "Sekai ni Hitotsu Dake no Hana" sold over two million copies in Japan, becoming one of the best-selling singles in the country.
 In August 2016, the group announced that they will disband by the year end.
 Since 2003, all of the band's releases have peaked at number one on the Oricon Albums or Singles Chart.
 The group has sold over 35 million records in Japan.
CNCO is a Latin American boy band formed on December 13, 2015, composed of Christopher Vélez, Richard Camacho, Joel Pimentel, Erick Brian Colón and Zabdiel de Jesús"."
 They won a 5-year recording contract with Sony Music Latin after becoming the winning competitors of the first season of "La Banda."
 The band toured with Ricky Martin and their singles, "Tan Fácil" and "Quisiera", charted well soon after their debut.
 They released their first album, "Primera Cita" on August 26, 2016.
 In August 2017, they became the first boy band to reach one billion views in YouTube, with their single "Reggaetón Lento (Bailemos).