Question: Who does the vocals on "Money" by the performer of Unknown Song?

full_context: Document 1: 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
Document 2: 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 3: 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 4: Party Sequence: "Party Sequence" is the seventh track by English progressive rock band Pink Floyd on their third album, "Soundtrack from the Film More".
Document 5: 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 6: Unknown Song: "Unknown Song" is an instrumental track written and recorded by the British progressive rock group Pink Floyd. It has been released only on a bonus disc included in the 1997 re-release of the soundtrack to Michelangelo Antonioni's movie "Zabriskie Point".
Document 7: Up the Khyber: "Up the Khyber" is a piece of instrumental music by the British rock band Pink Floyd. It was written by their drummer Nick Mason, and keyboardist Richard Wright.
Document 8: 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 9: 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 10: 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 11: One of the Few: "One of the Few" is a song by the British progressive rock band Pink Floyd. It was released as the third track on "The Final Cut" album in 1983. The song is 1 minute and 12 seconds long. It features a ticking clock in the background and a steady drumbeat. The melody features most of the D minor scale. The lyrics describe a war veteran's return from the battlefield (specifically a pilot from the Battle of Britain, commonly known as The Few) to pursue teaching. The ticking clock continues to the next track, "The Hero's Return", which is sung from the veteran's perspective. This is one of the rejected songs from "The Wall" and its working title was "Teach".
Document 12: 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 13: Heart Beat, Pig Meat: "Heart Beat, Pig Meat" is an instrumental song by progressive rock band Pink Floyd from the soundtrack to the film "Zabriskie Point".
Document 14: 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 15: 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
ground_truth: David Gilmour
sub_queries: Unknown Song >> performer Answer: Pink Floyd
who does the vocals on money by Pink Floyd Answer: David Gilmour