Question: Where was the performer who released The Soundhouse Tapes, formed?

full_context: Document 1: Avenged Sevenfold: Before the release of their debut album, the band recorded two demos in 1999 and 2000. In mid-2001, it was reported that Meacham had attempted suicide by drinking excessive amounts of cough syrup. The attempt affected the band's Take Action Tour. During his hospitalization he remained in poor condition and was replaced by Dameon Ash. In an interview, lead singer M. Shadows said of Meacham that ``he perma - fried his brain and was in a mental institution for a long time, and when you have someone in your band who does that, it ruins everything that's going on all around you, and it makes you want to do something to prevent it from happening to other people. ''Avenged Sevenfold's debut album, Sounding the Seventh Trumpet, was recorded when the band members were in their late teens and still in high school. It was originally released on their first label, Good Life Recordings in 2001. When lead guitarist Synyster Gates joined the band after the album was released, the introductory track`` To End the Rapture'' was re-recorded featuring a full band element. The album was subsequently re-released on Hopeless Records in 2002. The band started to receive recognition, performing with bands such as Mushroomhead and Shadows Fall and playing on the Take Action Tour.
Document 2: Sanctuary (Iron Maiden song): "Sanctuary" is the second single released by the British heavy metal band Iron Maiden. The single was released on 23 May 1980. Although originally issued as a non-album single, the song was added to the later US release of their debut studio record, "Iron Maiden" (1980). When the album was re-released in 1998, the song was added in all territories. In 1990, the 12" version was reissued on CD and 12" vinyl in "The First Ten Years" box set, in which it was combined with their first single, "Running Free".
Document 3: 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 4: The Soundhouse Tapes: The Soundhouse Tapes is the debut EP by Iron Maiden, and features the very first recordings by the band. Released on 9 November 1979, it features three songs taken from the demo tape recorded at Spaceward Studios on December 30/31 1978. The three tracks - "Prowler", "Invasion" and "Iron Maiden" - appear in a rougher form than they would on the first Iron Maiden album and subsequent singles as they were all recorded in one session.
Document 5: 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 6: Piece of Mind: Piece of Mind is the fourth studio album by the English heavy metal band Iron Maiden, originally released in 1983 by EMI and then by Capitol in Canada and the US, where it was later reissued by Sanctuary/Columbia Records. It was the first album to feature drummer Nicko McBrain, who had recently left the Paris-based band Trust and has been Iron Maiden's drummer ever since.
Document 7: Imagine Dragons: The band released EPs titled Imagine Dragons and Hell and Silence in 2010, both recorded at Battle Born Studios, in Las Vegas. They returned to the studio in 2011. The third EP, It's Time, was made before they signed a record deal.
Document 8: 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 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: 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 11: 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 12: 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 13: Best of the Beast: Best of the Beast was Iron Maiden's first "best of" album, released in 1996 in three formats: a 34 track (four disc) vinyl, a 27 track (two disc) CD, a 16 track (single disc) CD and MiniDisc. The vinyl edition is, to date, the band's longest record release, running for over three hours.
Document 14: 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 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 Soundhouse Tapes >> performer Answer: Iron Maiden
Iron Maiden >> location of formation Answer: Leyton