question: Which American composer wrote Symphony No. 4, based on the album Heroes by David Bowie?
answer: Philip Glass
context: Title: David Bowie
  Passage: David Robert Jones (8 January 1947 – 10 January 2016), known professionally as David Bowie ( ), was an English singer, songwriter and actor.  He was a leading figure in popular music for over five decades, acclaimed by critics and other musicians for his innovative work.  His career was marked by reinvention and visual presentation, his music and stagecraft significantly influencing popular music.  During his lifetime, his record sales, estimated at 140 million albums worldwide, made him one of the world's best-selling music artists.  In the UK, he was awarded nine platinum album certifications, eleven gold and eight silver, releasing eleven number-one albums.  In the US, he received five platinum and nine gold certifications.  He was inducted into the Rock and Roll Hall of Fame in 1996.
  Title: Just for One Day (Heroes)
  Passage: "Just for One Day (Heroes)" is a house song performed by French DJ David Guetta, and featuring vocals from singer David Bowie.  The song was released as the lead single from Guetta's compilation album, "Fuck Me I'm Famous 2003" in June 2003, and was also credited as the fifth single from his debut studio album, "Just a Little More Love".  The song contains a sample from Bowie's 1970s track, "Heroes".  The track was officially credited to 'David Guetta vs. Bowie'.  It peaked at No. 73 on the UK Singles Chart in July 2003.  The music video for "Just for One Day (Heroes)" can be found on YouTube.  It features a group of people partying at a rave, with Guetta performing the track in the background.
  Title: The Berlin Tapes (album)
  Passage: The Berlin Tapes is a covers / soundtrack album by Australian rock musician Iva Davies and his band Icehouse.  The record was a collaboration between Davies and classical music composer Max Lambert to accompany the Sydney Dance Company's production of the ballet "Berlin", for which Icehouse performed live on stage.  The covers are mostly acoustic, with piano, strings and subtle electronica incorporated into most tracks.  The record was initially released as a single or double disc set, with the second disc consisting of instrumental Icehouse tracks performed with the ballet.  A 1996 Japanese re-release included three bonus tracks; a 2002 digitally remastered version with five bonus tracks was released in Australia – this time credited simply to "Icehouse".  It was re-released in Australia in August 2004 and re-titled as Heroes (see second infobox at below right), coinciding with Seven Network's TV broadcast of the Athens Olympic Games, which had two tracks removed and a second mix of "Heroes" added. " Heroes" (The Athens Mix), a cover of David Bowie's original hit, was released in August 2004 and peaked at #93 on the Australian singles charts.
  Title: The Platinum Collection (David Bowie album)
  Passage: The Platinum Collection is a compilation album by David Bowie, released in 2005.  The period from 1969 to 1987 is summarised over three discs.  The first disc is the same as the compilation "The Best of David Bowie 1969/1974", which was released in 1997, and the second disc is the same as the 1998 compilation "The Best of David Bowie 1974/1979".  The third disc, original to this collection upon its release in 2005, was later re-released separately as an independent compilation "The Best of David Bowie 1980/1987" by EMI on 19   2007 (2007--) .  This 2007 release was part of EMI's two-disc Sight & Sound series of releases and features a DVD of 1980s videos on the second disc.
  Title: Nothing Has Changed
  Passage: Nothing Has Changed (also titled Nothing Has Changed: The Very Best of David Bowie) is a compilation album by English musician David Bowie.  It was released on 18 November 2014 through Parlophone in the United Kingdom, and Columbia Records and Legacy Recordings in the United States.  It is the first album to showcase Bowie's entire career and includes a new composition, "Sue (Or in a Season of Crime)", which was later re-recorded for his final album "Blackstar" (stylized as ★) (2016).  "Nothing Has Changed" is notable for including songs from Bowie's unreleased 2001 album "Toy": "Your Turn to Drive", previously an internet-only single, and a previously unreleased re-recorded version of "Let Me Sleep Beside You", both of which are found on the triple CD version of the album.  The album's title comes from a lyric in the song "Sunday" from Bowie's album "Heathen" (2002).
  Title: &quot;Heroes&quot; (David Bowie song)
  Passage: "Heroes" is a song recorded by the English musician David Bowie, written by Brian Eno and Bowie.  Produced by Bowie and Tony Visconti, it was recorded in July and August 1977, and released on 23 September 1977.  A product of Bowie's "Berlin" period, the track was not a huge hit in the UK or US at the time, but has gone on to become one of Bowie's signature songs.  In January 2016, following Bowie's death, the song reached a new peak of number 12 in the UK Singles Chart.  "Heroes" has been cited as Bowie's second-most covered song after "Rebel Rebel".
  Title: The Best of David Bowie 1974/1979
  Passage: The Best of David Bowie 1974/1979 is a compilation album by David Bowie released in 1998 (see 1998 in music).  It follows "The Best of David Bowie 1969/1974" (1997) and includes material released between 1974–1979.  This album was also included as the second disc of the compilation "The Platinum Collection" (2005/2006).
  Title: Symphony No. 4 (Glass)
  Passage: Heroes Symphony is a symphony (also known as Symphony No. 4 "Heroes") composed by American composer Philip Glass in 1996 based on the album ""Heroes"" by David Bowie.  Glass also based his earlier Low Symphony on the David Bowie album, "Low".
  Title: Scary Monsters (And Super Creeps)
  Passage: Scary Monsters (And Super Creeps), also known simply as Scary Monsters, is the fourteenth studio album by David Bowie, released on 12 September 1980 by RCA Records.  It was his final studio album on the label and his first following the so-called Berlin Trilogy of "Low", ""Heroes"" and "Lodger" (1977–1979).  Though considered very significant in artistic terms, the trilogy had proven less successful commercially.  With "Scary Monsters", Bowie achieved what biographer David Buckley called "the perfect balance" of creativity and mainstream success as well as earning critical acclaim; the album peaked at No. 1 in the UK and restored Bowie's commercial standing in the US.
  Title: The World of David Bowie
  Passage: The World of David Bowie is an album by David Bowie, released in 1970.  It contains material from his first album "David Bowie", as well as previously unreleased songs.  The track listing was chosen by Bowie himself.  The sleeve photo is by Ian Dickson.
citations: Symphony No. 4 (Glass) David Bowie