Question: Who composed the track not released as a single on Andy Williams' Greatest Hits Vol. 2?

Context paragraphs:
Andy Williams' Greatest Hits Vol. 2 (British album): Andy Williams' Greatest Hits Vol.  2 (British album)

Bob Dylan: The Complete Album Collection Vol. One: The Complete Album Collection Vol.  One is a forty-seven disc box set released on November 4, 2013 by Bob Dylan.  It includes thirty-five studio albums released between 1962 and 2012, six live albums, and a compilation album, "", which contains previously released material unavailable on regular studio albums and makes the compilations "Bob Dylan's Greatest Hits", "Bob Dylan's Greatest Hits Vol.  II", "Biograph", "Bob Dylan's Greatest Hits Volume 3" and "The Essential Bob Dylan" obsolete.  This release is the first time that the 1973 album "Dylan" has been released on CD in North America.  Fourteen of the albums have been remastered for this release.  Also included was a hardcover book featuring extensive new album-by-album liner notes penned by Clinton Heylin and a new introduction written by Bill Flanagan.

The Singular Adventures of The Style Council: The Singular Adventures of The Style Council is the first greatest hits album by The Style Council, released in 1989.  Subtitled Greatest Hits Vol.1, there was never a 'Volume 2' although other Style Council singles albums have been released, such as "Greatest Hits" in 2000.  However, the two compilations have different track listings in that "Singular Adventures" generally features full length versions, alongside some album tracks, is not run in chronological order and contains two less songs.

Greatest Hits, Vol. 1 (Rare Essence album): Greatest Hits, Vol.  1 (also titled as The Essence of Rare Essence: Greatest Hits Vol.  1) is a greatest hits album by Washington, D.C.-based go-go band Rare Essence.  The album was released on December 12, 1995, and consist of a compilation of ten songs from their previously released studio and live albums, including "Work the Walls", "Do the Mickey", "Body Moves", and "Do You Know What Time It Is".

The Impossible Dream (The Quest): "The Impossible Dream (The Quest)" is a popular song composed by Mitch Leigh, with lyrics written by Joe Darion.  The song is the most popular song from the 1965 Broadway musical "Man of La Mancha" and is also featured in the 1972 film of the same name starring Peter O'Toole.

Olivia Newton-John's Greatest Hits: Olivia Newton-John's Greatest Hits (1977) was the first compilation album released by Olivia Newton-John in the United States.  (In some other regions, Newton-John released a 1974 compilation, "First Impressions".  This album was therefore marketed instead as "Greatest Hits Vol.  2" and featured a different track listing.)  The album collected all of Newton-John's American Top 40 singles released between 1971 and 1977.  "Changes" was the only track not released as a single, but it was one of Newton-John's first self-written songs that she recorded.  The album was Newton-John's first platinum certification peaking No. 13 Pop and No. 7 Country.  It ended up being certified double Platinum in the US and Platinum in the UK and Canada, and also Gold in Hong Kong.

Andy Williams' Greatest Hits Vol. 2: Andy Williams' Greatest Hits Vol.  2 is a compilation album by American pop singer Andy Williams that was released in June 1973 by Columbia Records.  This collection follows in the footsteps of its predecessor, "Andy Williams' Greatest Hits", in that it is not limited to his biggest and most recent hit singles, although his final two US Top 40 entries ("(Where Do I Begin) Love Story" and "Speak Softly Love (Love Theme from 'The Godfather')") were included.  It also has an album track not released as a single ("The Impossible Dream (The Quest)"), a couple of hits from his time with Cadence Records ("Lonely Street" and "The Village of St. Bernadette"), two other singles that could have been included on the first volume ("In the Arms of Love" and "Music to Watch Girls By"), and two Easy Listening chart entries that never made the "Billboard" Hot 100 ("Home Lovin' Man" and "Music from Across the Way").

More Gold – 20 Super Hits Vol. II: More Gold – 20 Super Hits Vol.  II is a 1993 greatest hits album by Boney M..  As PolyGram released "More ABBA Gold" in 1993 to follow up the highly successful "", BMG and producer Frank Farian issued "More Gold - 20 Super Hits Vol.  II" containing the remainder of Boney M.'s best known songs - again most of them appearing in remixed or overdubbed form but credited as the original versions - as well as four new recordings featuring lead singer Liz Mitchell.

Andy Williams discography: Andy Williams recorded 43 studio albums, 17 of which (along with the 1970 compilation "Andy Williams' Greatest Hits") received Gold certification from the Recording Industry Association of America for selling 500,000 units.  Three of those recipients went on to reach one million in sales, for which they were awarded Platinum certification.  Between studio, Christmas, and compilation albums he had 37 entries on the pop albums chart in "Billboard" magazine with 12 of those making the top 10.  One of those 12, his 1963 album "Days of Wine and Roses and Other TV Requests", spent 16 weeks at number one and comes in at number five on the list of the top albums released in the 1960s in terms of "Billboard" chart performance.  During the 1960s and early 1970s two of his Platinum LPs, "The Andy Williams Christmas Album" and "Merry Christmas", made annual appearances on the magazine's Christmas Albums chart, where they each reached the number one position in multiple holiday seasons.  In a ranking of the top album artists of the 1960s in terms of "Billboard" chart performance, he comes in at number eight.

Greatest Hits, Vol. 3 (Johnny Cash album): Greatest Hits, Vol.  3 is a greatest hits compilation by country singer Johnny Cash, released on Columbia Records in 1978 (see 1978 in music).  It is the third and last part of the Johnny Cash "Greatest Hits" compilation series; the previous parts, "Greatest Hits, Vol.  1" and "Greatest Hits, Vol.  2", had been released in 1967 and 1971, respectively.

Supporting paragraphs: Andy Williams' Greatest Hits Vol. 2 The Impossible Dream (The Quest)
Answer: Mitch Leigh