Question: Where was the artist of The Angel and the Gambler formed?

full_context: Document 1: List of awards and nominations received by Iron Maiden: In 1994, one of their singles, "Fear of the Dark", received a Grammy nomination for Best Metal Performance. Seven years later, the band were nominated again in that category, with the song "The Wicker Man". In 2011, Iron Maiden won the award with "El Dorado". In 2002, they won the Ivor Novello Award for international achievement. Iron Maiden received a nomination from the "Kerrang!" Awards in the "Best Live Act" category in 2003, and were inducted into the "Kerrang!" Hall of Fame two years later. At the 2006 Metal Storm Awards, "A Matter of Life and Death" was named the best heavy metal album of the year. Iron Maiden have also received nine awards from fourteen nominations at the "Metal Hammer" Golden Gods Awards. Their mascot Eddie, who has previously been used by US critics to argue that Iron Maiden are Satanists, received a Golden Gods nomination in 2006, losing to singer Cristina Scabbia; but was awarded in 2008. Later in 2008, Iron Maiden were nominated in the Best Live Return category at the Vodafone Live Music Awards, to which the band disagreed with their nomination and asked to be withdrawn, stating that they were "not quite sure where we are returning from." They were replaced by the band James. The band were named "Best British Live Act" at the 2009 BRIT Awards, winning via a public poll. They were not able to attend the ceremony, ironically due to touring duties, instead delivering an acceptance message by video link-up. Their film "" won, in the category "24 Beats Per Second", at the SXSW film Festival, held in Austin, Texas, in March 2009. Overall, Iron Maiden have received twenty-nine awards from thirty-nine nominations.
Document 2: Classic Albums: Iron Maiden – The Number of the Beast: Classic Albums: Iron Maiden -- The Number of the Beast is a documentary about the making of the album of the same name by the British heavy metal band Iron Maiden, released on 26 November 2001 as part of the Classic Albums documentary series. Directed by Tim Kirkby, it featured cuts from the title track, ``Children of the Damned '',`` Run to the Hills'', and ``The Prisoner, ''in addition to extended interviews and live footage of`` Hallowed Be Thy Name'', recorded during the band's performance at the Rock in Rio festival in 2001.
Document 3: Virus (Iron Maiden song): "Virus" is a single from Iron Maiden, released in 1996. It is the first single since 1980's "Women in Uniform" that does not appear on any official Iron Maiden studio album. It was, however, featured as a brand new track on the band's first ever career retrospective — 1996's double-disc "Best of the Beast". It is the only Iron Maiden song to be credited to both of the band's guitarists. It has never been performed live by Iron Maiden, but Blaze Bayley performed it several times in his solo career. Lyrically, the song warns of rising business corruption in an increasingly Internet-dependent world.
Document 4: Wish I Had an Angel: ``Wish I Had An Angel ''is the eleventh single for Finnish symphonic metal band Nightwish, the second from their fifth album Once. The song features vocals by then - vocalist Tarja Turunen and bassist Marco Hietala. The song was still performed live after Turunen's departure with Anette Olzon, before her departure, and current vocalist Floor Jansen afterwards. Featured on the soundtrack of the film Alone In The Dark, it became the group's most popular single in Europe and in the United States, next to Nemo. It made it onto two U.S. film soundtracks. It reached # 60 in the UK Singles Chart, the highest of any of the band's singles in the UK.
Document 5: The Angel and the Gambler: "The Angel and the Gambler" is a single from the Iron Maiden album "Virtual XI", released in 1998. It preceded the release of "Virtual XI" by two weeks.
Document 6: Angel & Khriz: Angel & Khriz are a Puerto Rican reggaeton duo, consisting of Angel Rivera Guzmán (Angel) and Christian Colón Rolon (Khriz). Their high-impact performance on this first time out recording led to their sponsorship by Hector "El Father". Through that relationship the duo recorded their first single, "Cazando Voy," which reached platinum status and earned them the reputation as "the MVP's of the year." In 2004, they signed with MVP Records and toured extensively throughout South and Central America. The success of their debut recording, Los MVP's, garnered the attention and an eventual distribution with Universal's Machete Music, a label targeting the ever-growing urban Latino audience. Appearances in many U.S. cities to receptive crowds has earned the duo a reputation as one of reggaeton's most popular duos. In 2005, their debut studio album "Los MVP" was released and featured the hit singles "Ven Baílalo" and "De Cazeria". The album was certified Platinum by the United States Recording Industry Association of America (RIAA) and a special edition was released the following year. The special edition of "Los MVP" featured their two singles "Fua" and "De Lao a Lao". Performances at high-visibility events like opening Premios Juventud and closing the 2006 Latin Billboard Awards alongside Tito "El Bambino" and Wisin & Yandel continued to increase these budding artists' recognition and potential. Almost three years later, in 2008, their second studio album, Showtime was released. Singles featured on the album were "La Vecina" and "Na De Na". This album was released by Machete Music. Two years later, Da' Take Over, the duo's third studio album was released. It featured the hit singles "Ayer La Vi" & "Me Enamoré".
Document 7: Iron Maiden: Iron Maiden are an English heavy metal band formed in Leyton, East London, in 1975 by bassist and primary songwriter Steve Harris. The band's discography has grown to thirty-nine albums, including sixteen studio albums, twelve live albums, four EPs, and seven compilations.
Document 8: List of Iron Maiden concert tours: Iron Maiden are a British heavy metal band, founded in 1975 by bassist Steve Harris in London, England. After several personnel changes in the 1970s, the band settled on a lineup of Harris, Paul Di'Anno (lead vocals), Dave Murray (lead and rhythm guitars), Dennis Stratton (backing vocals, lead and rhythm guitar) and Clive Burr (drums), before they set out on their first professional tour, the Metal for Muthas Tour which supported the compilation album of the same name. After taking on a supporting slot with Judas Priest on their British Steel Tour and setting out on their own headline tour in support of their debut album, "Iron Maiden", the band supported Kiss on the European leg of their Unmasked Tour, following which Stratton was dismissed because of musical differences. Guitarist Adrian Smith was hired, following which Iron Maiden set out on a short series of UK dates before recording their second studio album, "Killers".
Document 9: Iron Maiden (album): Iron Maiden Studio album by Iron Maiden Released 14 April 1980 Recorded January 1980 Studio Kingsway Studios, London, England Genre Heavy metal Length 37: 35 Label EMI Harvest / Capitol (North America) Producer Wil Malone Iron Maiden studio albums chronology Iron Maiden (1980) Killers (1981) Killers 1981 1998 remastered version cover Singles from Iron Maiden ``Running Free ''Released: 8 February 1980`` Sanctuary *'' Released: 23 May 1980 * Not an original album track, but added to later editions
Document 10: Running Free: "Running Free" is the debut single by Iron Maiden, released on 8 February 1980 on the 7" 45 rpm vinyl record format. It was written by Steve Harris and Paul Di'Anno. The song appears as the third track on the band's debut album "Iron Maiden" (and the fourth track on its 1998 re-release). In 1985, a live version of the song was released as the first single from "Live After Death" (the band's twelfth single). In 1990, the original single was reissued on CD and 12" vinyl as part of "The First Ten Years" box, in which it was combined with the band's next single, "Sanctuary". The 1985 live single was also released as part of this box set, combined with 1985's "Run to the Hills".
Document 11: Twilight Zone (Iron Maiden song): "Twilight Zone" was the fourth single by Iron Maiden, released on 2 March 1981 and is the lead single to the 1981 LP "Killers". The song did not appear in the original album in February, but was included in the U.S. release in June and the international 1998 remaster. At the time of its release, it was the band's second-most successful single, peaking at No. 31 in the UK Singles Chart. It is the band's first single to feature guitarist Adrian Smith. In the 1990 box set, "The First Ten Years", it is on the same CD and 12" vinyl as the previous single, "Women in Uniform".
Document 12: The Final Frontier: The Final Frontier is the fifteenth studio album by British heavy metal band Iron Maiden. It was released on 13 August 2010 in Germany, Austria and Finland, 17 August in North America, 18 August in Japan, and 16 August worldwide. At 76 minutes and 34 seconds, it is the band's second-longest studio album to date, a duration surpassed only by 2015's "The Book of Souls".
Document 13: The Clairvoyant (song): "The Clairvoyant" is a song by the English heavy metal band Iron Maiden. It is the band's nineteenth single and the third from their seventh studio album, "Seventh Son of a Seventh Son" (1988). The single, which was also released as a clear vinyl, debuted at number six in the British charts. It contains three live performances from Maiden's 1988 headlining performance at the Monsters of Rock festival in Donington Park.
Document 14: Beast over Hammersmith: Beast over Hammersmith is a live album by the British heavy metal band Iron Maiden, released on 4 November 2002. Recorded 20 years previously, during The Beast On The Road tour at the Hammersmith Odeon, the footage was specially co-produced and mixed by Steve Harris and Doug Hall to be a part of the Eddie's Archive box set. Even though this album contains material from "The Number of the Beast", it was actually recorded two days prior to its release (although "Run to the Hills" had already been released as a single).
Document 15: British Lion (album): British Lion is the debut solo album from Steve Harris, best known as the bassist and primary songwriter for the British heavy metal band Iron Maiden. The album was announced on 18 July 2012 and released on 24 September.
ground_truth: Leyton
sub_queries: The Angel and the Gambler >> performer Answer: Iron Maiden
Iron Maiden >> location of formation Answer: Leyton