IN: Funeral for a Friend were a Welsh post-hardcore band from Bridgend, formed in 2001. The band consisted of lead vocalist Matthew Davies-Kreye and guitarist Kris Coombs-Roberts for its entire history, with Darran Smith (guitar), Gareth Davies (bass) and Ryan Richards (drums and screaming vocals) completing the line-up for the band's first four studio albums. Between 2008 and 2012 the band transitioned towards its final line-up, which saw Davies-Kreye and Coombs-Roberts alongside guitarist and occasional vocalist Gavin Burrough, bassist Richard Boucher and drummer Pat Lundy (who left the band in 2014). Funeral for a Friend's popularity rose in the United Kingdom with the release of their debut album, Casually Dressed & Deep in Conversation (2003).

When Michael Davies, one of January Thirst's original vocalists, quit in December 2001, Matthew Evans (vocals) and Johnny Phillips (drums) invited Matt Davies (later Davies-Kreye) to try out for the vacated singer position. Soon afterward, the band reformed as Funeral for a Friend; the name is derived from a song by Planes Mistaken for Stars, one of Davies' favourite bands at the time.  During the start of the New Year they parted ways with second guitarist Kerry Roberts (Kris Coombs-Roberts's brother) and found a suitable replacement in Darran Smith (ex-Tripcage). The band recorded four tracks at Mighty Atom Studios for a proposed self-financed EP with another Welsh band From This Moment On. Upon hearing the tracks, Mighty Atom Records approached the band and offered a two-album deal, resulting in their debut EP, Between Order and Model (2002). Before the EP's release, Andi Morris (bass) quit, with Phillips and Evans also leaving. The band then recruited Gareth Davies (later Ellis-Davies) on bass and Ryan Richards on drums. Matt Davies became the band's only primary vocalist, with Gareth Davies performing backing melodies and Richards taking over Evans' screaming role.  In 2003, Funeral for a Friend recorded their second EP, Four Ways to Scream Your Name, produced and mixed by Colin Richardson. In mid-2003, the band secured their first Kerrang! award, winning the award for "Best UK Newcomer", beating The Darkness, who won in all other nominated categories. Funeral for a Friend's win was largely attributed to their fervent fan base, as the awards winner was decided by public vote online at the official Kerrang! Web site. In August 2003, Funeral for a Friend opened the Concrete Jungle stage at the Reading and Leeds Festivals.

why did he quit?

OUT: Soon afterward, the band reformed as Funeral for a Friend;

input: The Dark Side of the Moon became one of the best-selling albums of all time and is in the top 25 of a list of best-selling albums in the United States. Although it held the number one spot in the US for only a week, it remained in the Billboard album chart for 741 weeks. The album re-appeared on the Billboard charts with the introduction of the Top Pop Catalog Albums chart in May 1991, and has been a perennial feature since then. In the UK, it is the seventh-best-selling album of all time and the highest selling album never to reach number one.  In the US the LP was released before the introduction of platinum awards on 1 January 1976. It therefore held only a gold disc until 16 February 1990, when it was certified 11x platinum. On 4 June 1998 the Recording Industry Association of America (RIAA) certified the album 15x platinum, denoting sales of fifteen million in the United States - making it their biggest-selling work there (The Wall is 23x platinum, but as a double album this signifies sales of 11.5 million). "Money" has sold well as a single, and as with "Time", remains a radio favourite; in the US, for the year ending 20 April 2005, "Time" was played on 13,723 occasions, and "Money" on 13,731 occasions. Industry sources suggest that worldwide sales of the album total about 45 million. "On a slow week" between 8,000 and 9,000 copies are sold, and a total of 400,000 were sold in 2002, making it the 200th-best-selling album of that year - nearly three decades after its initial release. The album has sold 9,502,000 copies in the US since 1991 when Nielsen SoundScan began tracking sales for Billboard. To this day, it occupies a prominent spot on Billboard's Pop Catalog Chart. It reached number one when the 2003 hybrid CD/SACD edition was released and sold 800,000 copies in the US. On the week of 5 May 2006 The Dark Side of the Moon achieved a combined total of 1,716 weeks on the Billboard 200 and Pop Catalog charts. One in every fourteen people in the US under the age of 50 is estimated to own, or to have owned, a copy. Upon a chart rule change in 2009 allowing catalogue titles to re-enter the Billboard 200, The Dark Side of the Moon returned to the chart at number 189 on 12 December of that year for its 742nd charting week. It has continued to sporadically appear on the Billboard 200 since then, reaching 900 weeks on the chart in April 2015.  "The combination of words and music hit a peak," explained Gilmour. "All the music before had not had any great lyrical point to it. And this one was clear and concise. The cover was also right. I think it's become like a benevolent noose hanging behind us. Throughout our entire career, people have said we would never top the Dark Side record and tour. But The Wall earned more in dollar terms."

Answer this question "How well did the album sell"
output:
became one of the best-selling albums of all time and is in the top 25 of a list of best-selling albums in the United States.