Question: A Sideman's Journey is the first solo album by German musician and artist Klaus Voormann, released in July 2009, he played bass on a large number of well-known albums by ex-Beatles, including which triple album, by English musician George Harrison?
Context: "What Is Life" is a song by the English musician George Harrison, released on his 1970 triple album "All Things Must Pass".  In many countries, it was issued as the second single from the album, in February 1971, becoming a top-ten hit in the United States, Canada and elsewhere, and topping singles charts in Australia and Switzerland.  In the United Kingdom, "What Is Life" appeared as the B-side to "My Sweet Lord", which was the best-selling single there of 1971.  Harrison's backing musicians on the song include Eric Clapton and the entire Delaney & Bonnie Friends band, with whom he had toured during the final months of the Beatles.  Harrison co-produced the recording with Phil Spector, whose Wall of Sound production also employed a prominent string arrangement by John Barham and multiple acoustic rhythm guitars, played by Harrison's fellow Apple Records signings Badfinger. All Things Must Pass is a triple album by English musician George Harrison.  Recorded and released in 1970, the album was Harrison's first solo work since the break-up of the Beatles in April that year, and his third solo album overall.  It includes the hit singles "My Sweet Lord" and "What Is Life", as well as songs such as "Isn't It a Pity" and the title track that had been turned down for inclusion on releases by the Beatles.  The album reflects the influence of Harrison's musical activities with artists such as Bob Dylan, the Band, Delaney & Bonnie and Billy Preston during 1968–70, and his growth as an artist beyond his supporting role to former bandmates John Lennon and Paul McCartney.  "All Things Must Pass" introduced Harrison's signature sound, the slide guitar, and the spiritual themes that would be present throughout his subsequent solo work.  The original vinyl release consisted of two LPs of songs and a third disc of informal jams, titled "Apple Jam".  Several commentators interpret Barry Feinstein's album cover photo, showing Harrison surrounded by four garden gnomes, as a statement on his independence from the Beatles. "Who Can See It" is a song by English musician George Harrison, released on his 1973 album "Living in the Material World".  The lyrics reflect Harrison's uneasy feelings towards the Beatles' legacy, three years after the group's break-up, and serve as his statement of independence from expectations raised by the band's unprecedented popularity.  Some music critics and biographers suggest that he wrote the song during a period of personal anguish, following the acclaim he had received as a solo artist with the 1970 triple album "All Things Must Pass" and his 1971–72 Bangladesh aid project.  The revelatory nature of the lyrics has encouraged comparisons between "Living in the Material World" and John Lennon's primal therapy-inspired 1970 release, "Plastic Ono Band". A Sideman's Journey is the first solo album by German musician and artist Klaus Voormann, released in July 2009.  Voormann is best known as the creator of the cover art for The Beatles' album "Revolver" as well as for being a much-in-demand session musician during the 1970s.  He played bass on a large number of well-known albums by ex-Beatles John Lennon, George Harrison and Ringo Starr − including "All Things Must Pass", "Imagine" and "The Concert for Bangladesh" − and by artists such as Harry Nilsson, Doris Troy, Lou Reed, Gary Wright, Carly Simon and Randy Newman.  Before then, Voormann had been a member of the 1960s pop group Manfred Mann.  "A Sideman's Journey" is notable for including performances by Paul McCartney, Ringo Starr and Yusuf Islam (Cat Stevens), among others. Footprint is the second solo album by American musician Gary Wright, released in 1971 on A&M Records.  It contains "Stand for Our Rights", an anthem-like song calling for social unity that was issued as a single in advance of the album.  Wright recorded the majority of "Footprint" in London with a large cast of musicians – including George Harrison, Hugh McCracken, Alan White, Klaus Voormann, Jim Gordon, Jim Keltner and Bobby Keys – many of whom, like Wright, had played on Harrison's "All Things Must Pass" triple album in 1970.  Harrison's contributions included an uncredited role as producer, and serve as an example of his support for Wright during the early stages of the latter's solo career.  The ballad "Love to Survive" is one of three tracks that feature an orchestral arrangement by John Barham. "Awaiting on You All" is a song by English musician George Harrison, released on his 1970 triple album, "All Things Must Pass".  Along with the single "My Sweet Lord", it is among the more overtly religious compositions on "All Things Must Pass", and the recording typifies co-producer Phil Spector's influence on the album, due to his liberal use of reverberation and other Wall of Sound production techniques.  Harrison recorded the track in London backed by musicians such as Eric Clapton, Bobby Whitlock, Klaus Voormann, Jim Gordon and Jim Price – many of whom he had toured with, as Delaney & Bonnie and Friends, in December 1969, while still officially a member of the Beatles.  Musically, the composition reflects Harrison's embracing of the gospel music genre, following his production of fellow Apple Records artists Billy Preston and Doris Troy. "I Live for You" is a song by English musician George Harrison originally recorded during the sessions for his "All Things Must Pass" triple album in 1970.  Long available on bootlegs, the song was finally released officially as a bonus track on the 30th anniversary reissue of "All Things Must Pass" in January 2001.  The released recording features only Harrison's lead vocal and Pete Drake's prominent pedal-steel guitar from the 1970 album sessions, with all other instruments overdubbed by Harrison and his son Dhani in 2000.  Despite the wealth of unreleased material recorded for "All Things Must Pass", it was the only new song included with the album's 2001 reissue.  Music critics recognise "I Live for You" as one of many George Harrison compositions that can be interpreted as both a traditional love song and a devotional song. "Ballad of Sir Frankie Crisp (Let It Roll)" is a song by English musician George Harrison, released on his 1970 triple album "All Things Must Pass".  Harrison wrote the song as a tribute to Frank Crisp, a nineteenth-century lawyer and the original owner of Friar Park – the Victorian Gothic residence in Henley-on-Thames, Oxfordshire, that Harrison purchased in early 1970.  Commentators have likened the song to a cinematic journey through the grand house and the grounds of the estate. Bobby Whitlock is the debut solo album by American songwriter and rock musician Bobby Whitlock, released in early 1972.  The album features all of the former members of Derek and the Dominos – Whitlock, Eric Clapton, Carl Radle and Jim Gordon – although never all together.  Other contributors include George Harrison, the sessions for whose 1970 triple album "All Things Must Pass" had led to the formation of the Dominos; Delaney and Bonnie Bramlett; and ex-Manfred Mann bassist Klaus Voormann. The Tin Man Was a Dreamer is a studio album by English musician Nicky Hopkins, released in 1973 on Columbia Records.  While Hopkins had long been well known for his distinctive, melodic style on piano and Wurlitzer electric piano, the album provided a rare opportunity to hear him sing, unlike his earlier solo releases "The Revolutionary Piano of Nicky Hopkins" and "Jamming with Edward! " The album was co-produced by Neil Young's regular producer, David Briggs, and featured contributions from George Harrison, Mick Taylor, Klaus Voormann and Hopkins' fellow Rolling Stones sidemen Bobby Keys and Jim Price.
Answer: All Things Must Pass