Question: Who does the vocals on Money by the band who released Welcome to the Machine?

full_context: Document 1: I Am the Walrus: John Lennon -- lead vocals, electric piano, Mellotron Paul McCartney -- bass guitar, tambourine George Harrison -- electric guitar Ringo Starr -- drums Orchestrated, directed and produced by George Martin Session musicians -- strings, brass, and woodwinds Mike Sammes singers -- backing vocals Ray Thomas -- backing vocals Mike Pinder -- backing vocals Engineered by Geoff Emerick and Ken Scott Mixed by Geoff Emerick and John Lennon
Document 2: Welcome to the Machine: "Welcome to the Machine" is the second song on Pink Floyd's 1975 album "Wish You Were Here". It features heavily processed synthesizers and acoustic guitars, as well as a wide range of tape effects. Both the music and the lyrics were written by bassist Roger Waters.
Document 3: The Piper at the Gates of Dawn: The Piper at the Gates of Dawn is the debut studio album by the English rock band Pink Floyd, and the only one made under founding member Syd Barrett's leadership. The album, named after the title of chapter seven of Kenneth Grahame's "The Wind in the Willows" and featuring a kaleidoscopic cover photo of the band taken by Vic Singh, was recorded from February to May 1967 and released on 4 August 1967. It was produced by Beatles engineer Norman Smith and released in 1967 by EMI Columbia in the United Kingdom and Tower in the United States, in August and October respectively. Two of the album's songs, "Astronomy Domine" and "Interstellar Overdrive", became long-term mainstays of the band's live set list, while other songs were performed live only a handful of times.
Document 4: Matilda Mother: "Matilda Mother" is a song by British band Pink Floyd, featured on their 1967 debut album, "The Piper at the Gates of Dawn". Written by Syd Barrett, it is sung mostly by Richard Wright with Barrett joining in on choruses and singing the whole last verse. It was the first song recorded for the album.
Document 5: Roger Waters discography: Roger Waterss primary instrument is the electric bass guitar. He briefly played a Höfner bass but replaced it with a Rickenbacker RM-1999/4001S, until around 1970 when he switched to Fender Precision basses. He often plays bass using a pick but is also known to play fingerstyle. Not only a bassist and vocalist, Waters has experimented with the EMS Synthi A and VCS 3 synthesisers and has played electric rhythm and acoustic guitars in recordings and in concert. Throughout his career he has used Selmer, WEM, Hiwatt and Ashdown amplifiers, also employing delay, tremolo, chorus, panning and phaser effects in his music.
Document 6: The Dark Side of the Moon: Returning from the US in January 1973, they recorded "Brain Damage", "Eclipse", "Any Colour You Like" and "On the Run", while fine-tuning the work they had already laid down in the previous sessions.  A foursome of female vocalists was assembled to sing on "Brain Damage", "Eclipse" and "Time", and saxophonist Dick Parry was booked to play on "Us and Them" and "Money".  With director Adrian Maben, the band also filmed studio footage for Pink Floyd: Live at Pompeii. Once the recording sessions were complete, the band began a tour of Europe.
Document 7: Wish You Were Here Tour: The North American Tour, also referred to as the Wish You Were Here Tour, was a concert tour by the British progressive rock band Pink Floyd in 1975 in support of their then-forthcoming album "Wish You Were Here". The tour was divided in two legs in the United States, West Coast and East Coast, and a gig in the UK at the Knebworth Festival.
Document 8: Speak to Me: "Speak to Me" is the first track on British progressive rock band Pink Floyd's 1973 album, "The Dark Side of the Moon", on which it forms an overture. Nick Mason receives a rare solo writing credit for the track, though recollections differ as to the reasons for this. Mason states that he created the track himself, whereas Richard Wright and Roger Waters stated the credit was a "gift" to Mason to give him some publishing income (subsequently regretted by the latter, following his acrimonious departure from the band). A live version is included on "Pulse".
Document 9: Have a Cigar: "Have a Cigar" is the third track on Pink Floyd's 1975 album "Wish You Were Here". It follows "Welcome to the Machine" and on the original LP opened side two. In some markets, the song was issued as a single. The song, written by Waters, is his own critique of the music industry at the time, and the hypocrisy of the band's record label to continue releasing more material.
Document 10: Money (Pink Floyd song): "Money" is a song by the English progressive rock band Pink Floyd from their 1973 album "The Dark Side of the Moon". Written by Roger Waters, it opened side two of the LP record.
Document 11: No More Lonely Nights: Paul McCartney -- lead vocal, piano Linda McCartney -- backing vocal, keyboards Eric Stewart -- backing vocal David Gilmour -- guitar solo Herbie Flowers -- bass Anne Dudley -- synthesiser Stuart Elliott -- drums
Document 12: The Great Gig in the Sky: ``The Great Gig in the Sky ''is the fifth track on The Dark Side of the Moon, the 1973 album by the English progressive rock band Pink Floyd. The song features music by Richard Wright and non-lexical vocals by Clare Torry.
Document 13: Shine On You Crazy Diamond: ``Shine On You Crazy Diamond ''The single edit of Part I Song series by Pink Floyd from the album Wish You Were Here Published Pink Floyd Music Publishers Ltd Released 15 September 1975 Recorded January -- July 1975 Genre Progressive rock ambient Length 26: 00 (All parts) 13: 32 (Parts I -- V) 12: 28 (Parts VI -- IX) 3: 53 (Single edit) Label Harvest (UK) Columbia / CBS (US) Songwriter (s) David Gilmour, Roger Waters, Richard Wright Producer (s) Pink Floyd
Document 14: Wish You Were Here (Pink Floyd song): ``Wish You Were Here ''is the title track on Pink Floyd's 1975 album Wish You Were Here. Like most of the album, it refers to former Pink Floyd member Syd Barrett and his breakdown. David Gilmour and Roger Waters collaborated to write the music, and Gilmour sang the lead vocal.
Document 15: Money (Pink Floyd song): David Gilmour -- lead vocals, electric guitars Roger Waters -- bass guitar, tape effects Richard Wright -- Wurlitzer electric piano (with wah - wah pedal) Nick Mason -- drums, tape effects
ground_truth: David Gilmour
sub_queries: Which performer released Welcome to the Machine? Answer: Pink Floyd
who does the vocals on money by Pink Floyd Answer: David Gilmour