Problem: Bullet for My Valentine, often abbreviated as BFMV, are a Welsh heavy metal band from Bridgend, formed in 1998. The band is currently composed of Matthew Tuck (lead vocals, rhythm guitar), Michael Paget (lead guitar, backing vocals), Jason Bowld (drums) and Jamie Mathias (bass guitar). Former members include Michael Thomas, Jason James and Nick Crandle; the latter were on bass. They were formed under the name Jeff Killed John and started their music career by covering songs by Metallica and Nirvana.

In an interview, Matt Tuck said that Bullet for My Valentine were going to start work on a new album before the Rule Britannia Tour which took place between 1 December 2013 till the 6 December 2013 in which the band played arenas in Britain supported by Young Guns and Asking Alexandria. In the interview Matt also said that they were strongly considering working with Terry Date, who has worked with bands such as Pantera and Deftones. He also said the band would bring back the thrash metal elements from Scream Aim Fire.  In November 2013, Bullet for My Valentine revealed though their Facebook page they were working on a new song. A short snippet of the song, titled "Raising Hell," was released on Matt Tuck's Vine profile on the 15th. The song was first played three days later via BBC Radio 1's Rock Show. It was made available for streaming and a music video for the song was released a week later.  In 2014, Matt announced on Twitter that the band were entering the studio to record a fifth album. On August 28th, the band appeared on paranormal television show Most Haunted for an investigation at the Newton House in Llandeilo, Carmarthenshire.  In an interview with Kerrang! on 21 January 2015, Matt revealed that Bullet for My Valentine will be hitting the studio next month with producer Colin Richardson who produced both The Poison and Scream Aim Fire, rather than Terry Date, who was the suggested producer initially. Tuck also said that their fifth album will be their heaviest album yet. On 9 February 2015, Bullet for My Valentine announced the departure of bassist Jason James, adding that they would announce a replacement when they felt "the time was right." They went on to say that until the announcement, they'd be busy and focused on recording their new record.  It was announced on the band's Facebook page in 2015 that a new song, "No Way Out," would debut on BBC Radio 1 on 17 May 2015. The band also revealed their fifth studio album to be titled Venom and their new bassist was going to be Jamie Mathias, formerly of metal band Revoker. Venom was set for release on 14 August 2015, the same day an expansive UK tour was announced. It was also revealed that Bullet For My Valentine will headline London's Camden Rocks festival which takes place on 30 May 2015.

How many copies did Venom go on to sell?

Answer with quotes: also revealed their


Problem: 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-eight albums, including sixteen studio albums, twelve live albums, four EPs, and seven compilations. Pioneers of the new wave of British heavy metal, Iron Maiden achieved initial success during the early 1980s. After several line-up changes, the band went on to release a series of UK and US platinum and gold albums, including 1982's The Number of the Beast, 1983's Piece of Mind, 1984's Powerslave, 1985's live release Live

On New Year's Eve 1978, Iron Maiden recorded a demo, consisting of four songs, at Spaceward Studios in Cambridge. Hoping the recording would help them secure more gigs, the band presented a copy to Neal Kay, then managing a heavy metal club called "Bandwagon Heavy Metal Soundhouse", located in Kingsbury Circle, northwest London. Upon hearing the tape, Kay began playing the demo regularly at the Bandwagon, and one of the songs, "Prowler", eventually went to No. 1 in the Soundhouse charts, which were published weekly in Sounds magazine. A copy was also acquired by Rod Smallwood, who soon became the band's manager, and, as Iron Maiden's popularity increased, they released the demo on their own record label as The Soundhouse Tapes, named after the club. Featuring only three tracks (one song, "Strange World", was excluded as the band were unsatisfied with its production) all five thousand copies were sold out within weeks.  In December 1979, the band secured a major record deal with EMI and asked Dave Murray's childhood friend Adrian Smith of Urchin to join the group as their second guitarist. Smith declined as he was busy with his own band, Urchin, so Iron Maiden hired guitarist Dennis Stratton instead. Shortly afterwards, Doug Sampson left due to health issues and was replaced by ex-Samson drummer Clive Burr at Stratton's suggestion on 26 December. Iron Maiden's first appearance on an album was on the Metal for Muthas compilation (released on 15 February 1980) with two early versions of "Sanctuary" and "Wrathchild". The release led to an ensuing tour which featured several other bands linked with the new wave of British heavy metal.  Iron Maiden's eponymous 1980 release, Iron Maiden, debuted at No. 4 in the UK Albums Chart. In addition to the title track (a live version of which would be one of the first music videos aired on MTV), the album includes other early favourites such as "Running Free", "Transylvania", "Phantom of the Opera", and "Sanctuary" - which was not on the original UK release but appeared on the US version and subsequent remasters. The band set out on a headline tour of the UK, before opening for Kiss on their 1980 Unmasked Tour's European leg as well as supporting Judas Priest on select dates. Iron Maiden also appeared, to much acclaim, at the Reading Festival 1980. They were second to top of the bill on the Saturday, with UFO headlining. After the Kiss tour, Dennis Stratton was dismissed from the band as a result of creative and personal differences, and was replaced by Adrian Smith in October 1980.  In 1981, Iron Maiden released their second album, entitled Killers. Containing many tracks written prior to their debut release, only two new songs were written for the record: "Prodigal Son" and "Murders in the Rue Morgue" (the latter's title was taken from the short story by Edgar Allan Poe). Unsatisfied with the production on their debut album, the band hired veteran producer Martin Birch, who would go on to work for Iron Maiden until his retirement in 1992. The record was followed by the band's first world tour, which included their debut performance in the United States, opening for Judas Priest at The Aladdin Casino, Las Vegas.

was the demo successful?

Answer with quotes:
Featuring only three tracks (one song, "Strange World", was excluded as the band were unsatisfied with its production) all five thousand copies were sold out within weeks.