Question: The Concert for Bangladesh included what German artist, musician, and record producer who designed artwork for many bands, including the Beatles and Bee Gees?

Context paragraphs:
Bee Gees' 1st: Bee Gees' 1st is the third studio album by English band Bee Gees, and their first international full-length recording after two albums distributed only in Australia and New Zealand.  "Bee Gees' 1st" was the group's debut album for the UK Polydor label, and for the US Atco label.  "Bee Gees 1st" was released on 14 July 1967 in the UK.  On 9 August it entered the UK charts, on that same day, the album was released in the US, and it entered the US charts on 26 August.  After its release, the band became more self-sufficient, producing and mixing many of their own releases.

Steve Rucker: Stephen "Steve" Rucker (born 2 March 1954) is an American musician and drummer who served as the drummer with many artists.  His biggest and well known act was the Bee Gees.  With the Bee Gees band, he appeared on "The Tonight Show", "Late Night with David Letterman", Oprah Winfrey, The Rosie O'Donnell Show, the Rock and Roll Hall of Fame induction and a Royal Variety Performance for the Queen of England.  Rucker appears on the Bee Gees' "One Night Only" recording and DVD.  He is currently the Drumset Studies director of the University of Miami's Frost School of Music.

The Concert for Bangladesh (film): The Concert for Bangladesh is a film directed by Saul Swimmer and released in 1972.  The film documents the two benefit concerts that were organised by George Harrison and Ravi Shankar to raise funds for refugees of the Bangladesh Liberation War, and were held on Sunday, 1 August 1971 at Madison Square Garden in New York City.  As well as notable performances from Harrison and Shankar, the film includes "main performer" contributions from Harrison's fellow ex-Beatle Ringo Starr, Billy Preston and Leon Russell, and a surprise walk-on from Bob Dylan.  Other contributing musicians include Ali Akbar Khan, Eric Clapton, the band Badfinger, Klaus Voormann, Jesse Ed Davis, Jim Horn and Jim Keltner.

Warm Ride: "Warm Ride" is a song written by Barry, Robin and Maurice Gibb, and recorded by the Bee Gees and during the 1977 "Saturday Night Fever" sessions in France.  The Bee Gees original, if unfinished, recording remained unreleased until 2007 when it was mixed and included on a reissue of "Bee Gees Greatest".  The song was an outtake from the soundtrack.

Klaus Voormann: Klaus Voormann (born 29 April 1938) is a German artist, musician, and record producer.  He designed artwork for many bands including the Beatles, Harry Nilsson, the Bee Gees, Wet Wet Wet and Turbonegro.  His most notable work as a producer was his work with the band Trio, including their worldwide hit "Da Da Da".  As a musician, Voormann is best known for being the bassist for Manfred Mann from 1966 to 1969, and for performing as a session musician on a host of recordings, including "You're So Vain" by Carly Simon and many by former members of the Beatles.

The Bee Gees Sing and Play 14 Barry Gibb Songs: The Bee Gees Sing and Play 14 Barry Gibb Songs is the debut studio album by the English pop band the Bee Gees.  (1967's "Bee Gees' 1st" was the "international" debut album).  Released under the artist title "Barry Gibb & the Bee Gee's" "[sic]", it was released in November 1965 on the Australian Leedon label.  It is a compilation of most of the Gibb brothers' singles that had been released over the previous three years in Australia, which accounts for the many different styles of music on it.

The Bee Gees Special: The Bee Gees Special is a 90-minute television special featuring The Bee Gees and broadcast by NBC on November 15, 1979.  The program featured footage from the Bee Gees' July 10, 1979 concert at Oakland Coliseum Arena in Oakland, California captured by a film crew that accompanied them during their Spirits Having Flown Tour.  It also included footage from an appearance with Willie Nelson and Glen Campbell, interviews by David Frost with the Bee Gees and their parents, and a behind-the-scenes look at recording and tour planning with Robert Stigwood and the band's crew.

Life in a Tin Can: Life in a Tin Can is the Bee Gees' eleventh studio album (ninth worldwide), released in January 1973.  The Bee Gees moved their base of operations from England to Los Angeles to record "Life in a Tin Can".  However, it was unable to prevent a commercial decline with the album criticised for a lack of innovation.  Despite its low sales and poor chart performance, "Life in a Tin Can" was awarded "Album of the Year" by "Record World" magazine.  It was the first Bee Gees album to bear the RSO label in the US.

Blue Weaver: A founder member of Amen Corner and its successor Fair Weather, Weaver replaced Rick Wakeman in Strawbs when he left to join Yes.  Weaver was with the Strawbs during their most successful and critically acclaimed period where he played some notable mellotron and other keyboard sequences on their albums "Grave New World" and "Bursting at the Seams".  He left Strawbs in 1973, and toured with Mott the Hoople in the US tour.  Queen were their support act.  He also appeared with the Streetwalkers and session work followed, including work with the Pet Shop Boys.  He also played behind the Bee Gees at the initiation of his former Amen Corner colleague drummer Dennis Bryon, who had joined their backing band a year earlier during their successful 1975-79 period, taking in such highlights as "Jive Talkin'", "You Should Be Dancing" and the band's famous contributions on the "Saturday Night Fever" soundtrack.  The three-piece backing band of Weaver, Bryon and the perennial Bee Gees sideman, Alan Kendall, played on the Bee Gees' albums, "Main Course", "Children of the World", "Here at Last... Bee Gees... Live" and "Spirits Having Flown".  Unusually, Weaver featured as a co-composer on "(Our Love) Don't Throw It All Away", made a hit by the group's younger brother Andy Gibb.  Weaver also co-composed the songs for Jimmy Ruffin's 1980 album "Sunrise" with Robin Gibb as lyricist, including the hit single, "Hold On (To My Love)".

Spirits Having Flown: Spirits Having Flown is the fifteenth album released by the Bee Gees.  It was the group's first album after their collaboration on the "" soundtrack.  The album's first three tracks were released as singles and all reached No. 1 in the US, giving the Bee Gees an unbroken run of six US chart-toppers and tying a record set by The Beatles.  It was the first Bee Gees album to make the UK top 40 in ten years (not counting the soundtrack for "Saturday Night Fever"), as well as being their first and only UK No. 1 album.

Supporting paragraphs: The Concert for Bangladesh (film) Klaus Voormann
Answer: Klaus Voormann