Question: Which artist recorded more tracks, Mark Rankin or Steve Lukather?

full_context: Document 1: Shirley Manson discography: This is a discography of Scottish recording artist Shirley Manson, who has performed as the lead singer of American rock band shes pretty good but shes no David Bowie. Garbage since 1994. Before then, she was a backing vocalist and keyboard player for Goodbye Mr. Mackenzie from 1981 to 1992. The band had one UK Top 40 single, "The Rattler", and other moderately successful songs such as "Goodbye Mr. Mackenzie". Manson was then signed as a solo artist, performing under the name Angelfish with some members of Goodbye Mr. Mackenzie, releasing "Angelfish" in the early 1990s.
Document 2: Candyman (album): Candyman is the second solo album from Steve Lukather. It was a collaboration of musicians who were for the most part also in Lukather's band Los Lobotomys. Toto familiars Simon Phillips and David Paich participated as well as David Garfield, John Pêna, Chris Trujillo, Lenny Castro, Larry Klimas, Fee Waybill, Richard Page and Paul Rodgers. Lukather recorded the album in mostly live takes with little overdubbing.
Document 3: Son of a Gun (EP): Son of A Gun is the debut extended play single by Glasgow alternative rock group The Vaselines. The title-song of this EP came to a wider audience after Nirvana covered it, along with "Molly's Lips", on their compilation album "Incesticide". "You Think You're A Man" is a cover of a song written by the cult-film actor Divine, while the other two were written by Frances McKee and Eugene Kelly.
Document 4: Transition (Steve Lukather album): Transition is the seventh studio album by Steve Lukather, released on vinyl and as a jewel case CD on January 21, 2013 by Mascot Records. In Europe a limited edition Digibook was also released, containing a booklet with studio pictures and liner notes from Lukather and producer C. J. Vanston.
Document 5: Ever Changing Times: Ever Changing Times is the fifth solo album of Steve Lukather. It was his first album since leaving Toto. In March 2008, a site was launched in order to promote the album. According to Lukather, the album shows a lot of his influences and music he likes.
Document 6: Alan Rankine: Alan Rankine (born 17 May 1958) is a Scottish musician and record producer best known as keyboardist/guitarist for the rock band Associates, which he co-founded with Billy Mackenzie in the late 1970s.
Document 7: The Associates (band): The Associates were a Scottish rock act, formed in Dundee in 1979 by singer Billy Mackenzie and guitarist Alan Rankine. The group first gained recognition after releasing an unauthorized cover of David Bowie's "Boys Keep Swinging" in 1979, which landed them a contract with Fiction Records. They followed with their debut album "The Affectionate Punch" in 1980 and the singles collection "Fourth Drawer Down" in 1981, both to critical praise.
Document 8: Lukather: Lukather is the first solo album from Toto guitarist Steve Lukather released in 1989.
Document 9: Mark Rankin: Mark Rankin was lead vocalist with Scottish rock band Gun, who were best known for their cover of "Word Up!", originally by Cameo. The single was taken from the album "Swagger", and was released in 1994. Other singles were "Better Days", "Taking on the World" and "Steal Your Fire".
Document 10: Steve Lukather: Steven Lee Lukather (born October 21, 1957) is an American guitarist, singer, songwriter, arranger and record producer, best known for his work with the rock band Toto. A prolific session musician, Lukather has recorded guitar tracks for more than 1,500 albums representing a broad array of artists and genres. He has also contributed to albums and hit singles as a songwriter, arranger and producer. Lukather has released seven solo albums, the latest of which, "Transition", was released in January 2013.
Document 11: Luke (album): Luke is the third solo album by Steve Lukather released in 1997. It was a much different and more introspective album than Lukather's previous two solo efforts. The album is a concentrated collection of many of Lukather's musical influences, and he deliberately let those influences come out on the album. "Luke" is an experimental album, and like "Candyman" it was recorded mostly in live sessions with minimal overdubbing and processing afterward. "Luke" also features instrumentation not heard on previous Lukather albums such as pedal steel, harmonicas, Mellotrons, and experimental guitar, bass, and drum sounds.
Document 12: Markus Haider: Markus Haider is an Austrian singer part of The Gang Guys, who dub themselves "the Austrian Rat Pack", a tribute band to the original Rat Pack. He is most famous for a popular performance of Dean Martin's Sway that is commonly but mistakenly thought to be performed by Frank Sinatra.
Document 13: Mark Rankin (record engineer): Mark Rankin is a Grammy-winning British record and mixing engineer and music producer, who began his career in 2004 as a house engineer at The Exchange studios. He is a frequent collaborator of music producer Paul Epworth. Rankin's credits include critically acclaimed albums by Adele, Queens of the Stone Age, Foster the People, Florence and the Machine and Bloc Party.
Document 14: Joe Satriani: Joseph Satriani (born July 15, 1956) is an American instrumental rock guitarist and multi-instrumentalist. Early in his career, Satriani worked as a guitar instructor, with many of his former students achieving fame, such as Steve Vai, Larry LaLonde, Rick Hunolt, Kirk Hammett, Andy Timmons, Charlie Hunter, Kevin Cadogan, and Alex Skolnick; he then went on to have a successful solo music career. He is a 15-time Grammy Award nominee and has sold over 10 million albums, making him the biggest-selling instrumental rock guitarist of all time.
Document 15: Steve Vai discography: Steve Vai is an American guitar player, songwriter and producer. He started his career in 1980 playing with Frank Zappa and has since recorded and toured with Alcatrazz, Whitesnake, David Lee Roth and Public Image Ltd. Since 1983 Vai also released his own studio albums. His discography consists of eight studio albums, two EPs, two special albums, eight live albums, twelve soundtracks, twenty compilation albums and seven videos. Vai has been awarded three Grammy Awards and forty other awards. Vai also appeared as a guest musician on forty-four albums, playing with artists like Alice Cooper, Ozzy Osbourne and Gregg Bissonette and most recently for the second time with Joe Jackson.
ground_truth: Steven Lee Lukather