Question: Which artist also had a solo career, Jeff Martin or Mark Rankin?

full_context: Document 1: Soulbreaking: "Soulbreaking" is a song by Canadian rock band The Tea Party. It was released as a charity single in Canada to assist the White Ribbon Campaign. The charity single was issued in standard and limited quantities, with 100% of the proceeds from the sale of the limited edition of 400 individually numbered and autographed pieces donated to charity. The single features "Leaning on Love," the earliest released Jeff Martin solo song, inspired by the events of September 11, with some royalties donated to "The Morty Frank Memorial Fund" - Mr. Frank, a friend of the band, was killed while working at the World Trade Center.
Document 2: Jeff Healey: Norman Jeffrey "Jeff" Healey (March 25, 1966 – March 2, 2008) was a Canadian jazz and blues-rock vocalist, guitarist, and songwriter who attained musical and personal popularity, particularly in the 1980s and 1990s. He hit Number 5 on the U.S. "Billboard" Hot 100 chart with "Angel Eyes" and reached the Top 10 in Canada with the songs "I Think I Love You Too Much" and "How Long Can a Man Be Strong".
Document 3: Live in Dublin (Jeff Martin album): Live in Dublin (2007) is a live album by Canadian singer/songwriter Jeff Martin. The album is a complete recording of a live performance which included many songs written by The Tea Party, numerous covers (complete, and partial within other songs), as well as Martin's solo compositions.
Document 4: 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 5: 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 6: Jeff Martin (Canadian musician): Jeffrey Scott Martin (born October 2, 1969 in Windsor, Ontario) is a Canadian guitarist and singer-songwriter best known for fronting the rock band The Tea Party. Martin began his career as a solo artist in October 2005, when The Tea Party went on hiatus.
Document 7: Jeff Martin (American musician): Jeffery Louis Martin is an American musician, singer and drummer who has sung for the bands Surgical Steel, Racer X, Leatherwolf, and played drums for the bands Badlands, Blindside Blues Band, and Red Sea. Jeff Martin played drums for Paul Gilbert, George Lynch, Michael Schenker, Dokken and P.K. Mitchell. He also played drums in Surgical Steel before switching to lead vocals. He has released a solo album in 2006 entitled "The Fool", featuring the guitar talents of Paul Gilbert and Michael Schenker and has also sung backing vocals for Judas Priest and The Scream.
Document 8: Marky Mark and the Funky Bunch: Marky Mark and the Funky Bunch was an American hip-hop group led by Mark Wahlberg. The Funky Bunch consisted of Wahlberg (alias Marky Mark), Scott Ross (alias Scottie Gee), Hector Barros (alias Hector the Booty Inspector), Terry Yancey (alias DJ-T), and Anthony Thomas (alias Ashey Ace). The group's best known song is "Good Vibrations", which made it to number one on the "Billboard" Hot 100 in 1991.
Document 9: 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 10: Stuart Chatwood: Stuart Chatwood, (born 22 October 1969 in Fleetwood, Lancashire, England) is a Canadian musician, best known as the bass guitar and keyboard player for the rock band The Tea Party. The Tea Party are known for fusing together musical styles of both the Eastern and Western worlds, in what they call "Moroccan roll". In 2001, Chatwood won a Juno Award for the best artwork for a Tea Party album.
Document 11: Jeff Martin 777: Jeff Martin 777 was a rock band from Perth, Western Australia. The band's name was inspired by Jeff Martin's study of the occult, specifically the work of Aleister Crowley. Martin formed the band with former Sleepy Jackson members Malcolm Clark and Jay Cortez in 2010, after the demise of his previous band The Armada. The band ended in 2012 after the re-activation of Martin's former group The Tea Party in 2011.
Document 12: 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 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: 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 15: 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.
ground_truth: Jeffrey Scott Martin