Question: I've Been Loving You was the debut single for the pianist who has worked with Bernie Taupin since what year?

Context articles: Mona Lisas and Mad Hatters
I've Been Loving You
The Man (Aloe Blacc song)
Elton John
We Built This City
Sleeping with the Past
Taupin
Jim Cregan
Sick City (song)
You Gotta Love Someone

"Mona Lisas and Mad Hatters" is a song from the Elton John album "Honky Château".
 The lyrics were written by Bernie Taupin and is his take on New York City after hearing a gun go off near his hotel window during his first visit to the city.
 The song's lyrics were partly inspired by Ben E. King's "Spanish Harlem," written by Jerry Leiber and Phil Spector, in which he sings "There is a rose in Spanish Harlem."
 In response to this, Taupin writes, Allmusic critic Stewart Mason noted that the song is "less saccharine than many similar Elton John and Bernie Taupin ballads" and praised the "somewhat uncharacteristic emotional directness" of its lyrics.
 It was released as the B-side of the "Harmony" U.K. single in 1980.
"I've Been Loving You" is the 1968 debut single by Elton John with lyrics credited to Bernie Taupin (although John later admitted that he wrote the song by himself, giving Taupin credit as an effort to earn Taupin his first publishing royalties).
 The B-side is "Here's to the Next Time", an Elton John composition.
 "I've Been Loving You" was not originally included on any album and the single was withdrawn shortly after its release.
 Neither side appeared on any official album release until the 1992 "Rare Masters" box set (which featured previously unreleased stereo mixes of both).
"The Man" is a song by American vocalist Aloe Blacc.
 First included on his EP "Wake Me Up", the song was later released as the second single from his third studio album "Lift Your Spirit" by Interscope Records.
 Blacc co-wrote the track with its producers, DJ Khalil, as well as Sam Barsh and Daniel Seeff.
 Elton John and Bernie Taupin are also credited as co-writers, because the song's chorus is built upon an interpolation of the line "You can tell everybody" from John's 1971 single "Your Song", co-written with Taupin.
Sir Elton Hercules John, (born Reginald Kenneth Dwight; 25 March 1947), is an English singer, pianist, and composer.
 He has worked with lyricist Bernie Taupin as his songwriting partner since 1967; they have collaborated on more than 30 albums to date.
 In his five-decade career Elton John has sold more than 300million records, making him one of the best-selling music artists in the world.
 He has more than fifty Top 40 hits, including seven consecutive No. 1 US albums, 58 "Billboard" Top 40 singles, 27 Top 10, four No. 2 and nine No. 1.
 For 31 consecutive years (1970–2000) he had at least one song in the "Billboard" Hot 100.
 His tribute single, re-penned in dedication to the late Princess Diana, "Candle in the Wind 1997" sold over 33million copies worldwide and is the best-selling single in the history of the UK and US singles charts.
 He has also composed music, produced records, and has occasionally acted in films.
 John owned Watford Football Club from 1976 to 1987, and 1997 to 2002.
 He is an honorary Life President of the club, and in 2014 had a stand named after him at the club's home stadium.
"We Built This City" is a 1985 song written by Bernie Taupin, Martin Page, Dennis Lambert, and Peter Wolf, and originally recorded by US rock group Starship and released as their debut single on their album "Knee Deep in the Hoopla".
Sleeping with the Past is the 22nd studio album by the English singer-songwriter Elton John, released on 29 August 1989.
 It is his best-selling album in Denmark (where it was recorded) and is dedicated to his longtime writing partner Bernie Taupin.
 The album features his first solo number-one single, "Sacrifice", in his home country of the UK, which helped the album also hit number one there, his first since 1974's "Elton John's Greatest Hits".
 John and Taupin meant for the songs to reflect the style of 1960s R&B icons such as Marvin Gaye, Otis Redding and Sam Cooke, whom they admired.
 It also became his first platinum album in the UK since 1983.
 In the US it was certified gold in October 1989 and platinum in April 1990 by the RIAA.
 Guy Babylon made his debut on this album and would continue to play keyboards with John for the next 20 years, while Fred Mandel left the band shortly after.
 John went into rehabilitation in 1990.
Taupin is lyricist Bernie Taupin's first solo album.
 It is a spoken word album of his poetry.
 Taupin is well known for his collaboration with Elton John writing the lyrics to the vast majority of songs on his albums, and he worked with the same musicians John used on his albums in order to create his own.
 Gus Dudgeon produced the album and Steve Brown coordinated it.
James Cregan (born 9 March 1946) is an English rock guitarist and bassist, best known for his associations with Family, Steve Harley & Cockney Rebel and Rod Stewart.
 Cregan is a former husband of the singer Linda Lewis and worked with her as a record producer.
 He has also worked with London Quireboys, Glass Tiger, Katie Melua and formed "Farm Dogs" with Bernie Taupin.
"Sick City" is a song by Elton John with lyrics written by Bernie Taupin.
 It is the B-side of the single release of "Don't Let the Sun Go Down on Me", released in 1974.
 It later appeared on the 1995 remaster of the album "Caribou".
 The song is about a groupie, and the life in 1970's New York which Bernie Taupin has had a love/hate relationship with from time to time.
 Musically it features the Tower of Power Horns which appear on "Caribou".
 It also features altered piano tones through a Leslie speaker.
"You Gotta Love Someone" is a 1990 song by Elton John, written by John along with Bernie Taupin and was released as a single from the "Days of Thunder" soundtrack; the single was also used to promote the Rocket Records 2-CD retrospective "The Very Best of Elton John," issued largely in overseas markets excluding the U.S., where the more expansive box set "To Be Continued..." was issued.
 The single peaked at number forty-three on the "Billboard" Hot 100, but spent five weeks at number one on the Adult Contemporary chart, his tenth number one on the chart (which is found to be peculiar, as the single was not released in America.)