Question: Which artist, Aaron Lewis or Mark Rankin, went on to pursue a solo career?

Context paragraphs:
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.

Oh Mother: "Oh Mother" is a song recorded by American singer Christina Aguilera for her fifth studio album, "Back to Basics" (2006).  The song was released on November 23, 2007 by RCA Records as the fourth and final single from the album in European territories, while "Slow Down Baby" was serviced as the final single in Oceania.  It was written by Aguilera, Derryck Thornton, Mark Rankin, Liz Thornton, Christophe Barratier, Bruno Coulais and Kara DioGuardi.  Production was done by Big Tank and Q, with L Boggie credited as co-producer and Aguilera serviced as additional producer.

Jessica Rankin: Jessica Rankin (born 1971, Sydney) is an Australian artist who lives and works in New York.  She has participated in numerous group exhibitions in the US, Europe and Australia.  Recent solo exhibitions include White Cube, London (2007), PS1 Contemporary Arts Center, New York (2006) and Franklin Artworks, Minneapolis (2005).  Rankin is best known for her organdy 'embroidered paintings' as well as her drawings, watercolors, and editioned prints, sometimes linked to her larger scale works.  Rankin's father is also a successful artist David Rankin.  Her mother was poet and playwright Jennifer Rankin and her step-mother is author and poet Lily Brett.  Rankin shares her studio with her partner, also a celebrated artist, Julie Mehretu.  Rankin is represented by Christian Haye of The Project gallery in the USA and in 2007 began to exhibit with Jay Jopling at the White Cube art gallery in the UK.

Jimmy Rankin: James Kevin Rankin (born May 28, 1964) is a Canadian country and folk artist.  A member of The Rankin Family, Rankin has also released six solo albums, "Song Dog" (2001), "Handmade" (2003), "Edge of Day" (2007), "Forget About the World" (2011), "Tinsel Town" (2012) and "Back Road Paradise" (2014).  Rankin's solo and Rankin Family awards include 5 Junos, 27 East Coast Music Awards, 9 SOCAN top radio play Awards, 7 Canadian Country Music Awards, 2 Music NS Awards, and 2 Canadian Radio Music Awards.

Mark Herring: Mark Rankin Herring (born September 25, 1961) is an American lawyer serving as the 47th and current Attorney General of Virginia.  He is a member of the Democratic Party.  Previously, he served in the Senate of Virginia since a 2006 special election.  He represented the 33rd district, made up of parts of Fairfax and Loudoun counties.

Zenji flava: Zenji Flava is a common nickname for Zanzibari hip hop, a genre that began to develop in the 1990s.  Cool Para said to be the first rapper to pioneer Zenji Flava during the 90s.  He was using Saleh Jabri's tape to rap on some local shows in Zanzibar until 1996 when he teamed-up with another rapper named Cool Muza together with others they formed a rap group called "Struggling Islanders.  They made their debut single "Historia" in early 1997.  Though the group short-lived and Cool Para and Muza both went to pursue a solo career.  Cool Para was the first rapper in Zanzibar and Tanzania mainland to make rap and taarab fusion called taarap.  With it he went to record a song with the most prominent taarab music band widely known as the East African Melody Modern Taarab, the song was known as "Loo Umezoea" which was released early 2000.  He also did "Kwenye Mataa" with the same taarab band in 1998.  Before Cool Para, there was also another short-lived crew named Contish.  The group consisted with two members Abdul and Hakim.  They released their only album called "Mabishoo" (93).  The album was available all over Zanzibar and Tanzania.  They were using Swahili lyrics over ragga instrumentals such as 'Tingaling' by Shabba Ranks.  Sam,e style as Saleh J. Sometimes later they disbanded and Kim went on pursue a solo and released an album called Kim Pekee.  Abdul went to live abroad.  The name is made of "zenji", which is slang for "Zanzibar", and "flava", which is a corruption of "flavour", thus meaning "of Zanzibari taste".  As with bongo flava, i.e., Tanzanian mainland's hip hop, zenji flava is usually sung in swahili; the main difference between the two subgenres is that Zanzibari hip hop also reflects some influence of taarab, and thus indirectly of Arab music and Indian music.  Notable zenji flava artists include Ali Haji.  As Zenji flavour goes on it find itself as a sub part of Bongo flava as it has influence from the young generation of artists who want to cop with Bongo flava.  like Offside trick, 2 berry now is separated to form two solo artists（Berry black and Berry white）, Wazenji kijiwe and Shaka zulu, others are East connection which was made up with almost seven groups of artist including Offside trick Brooklyn, Four nature, Jumbo camp, Queen love, and K jam.  It was in this time that Zenji flava was modernized with rapid growth in the number of artists.

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".

Sinner (Aaron Lewis album): Sinner is the second solo studio album by Aaron Lewis from the American rock band Staind.  It was released in September 16, 2016, through Dot Records, and produced by Buddy Cannon.  The first single, "That Ain't Country", was released on June 17, 2016, which coincided with the album announcement.  To support the album, Lewis is doing a series of concerts titled "The Sinner Tour".

Frank Hannon: Frank Hannon (born October 3, 1966 in Sacramento, California), is best known as the guitarist, songwriter and a co-founder of the multi-platinum band Tesla, and is now established as a solo singer/songwriter with his album Gypsy Highway.  Drawing on his early childhood influences of American Folk artists such as Bob Dylan, John Denver, and Willie Nelson, Frank Hannon has showcased his lyrical, vocal, and "acoustic" storytelling song writing abilities on the self produced album.  Apart from recent Tesla concerts, Frank Hannon has been performing solo "acoustic" shows, one in particular was the KGGO "Summer Jam" in Des Moines Iowa where he performed throughout the day in between artist such as John Waite, 38 special, and BTO in front of 10,000 fans singing by himself with an acoustic guitar, and recently performing with Aaron Lewis who is also known for such solo acoustic performances.  Frank has recently formed the independent label RedHawk Records.

Aaron Lewis: Aaron Lewis (born April 13, 1972) is an American musician and songwriter, who is the lead vocalist, rhythm guitarist, and founding member of the rock band Staind, with whom he has released seven studio albums.  He has since ventured into country music with his debut solo EP "Town Line", which was released on March 1, 2011 on Stroudavarious Records.  Lewis' first full-length solo release, "The Road", was released by Blaster Records on November 13, 2012.

Supporting paragraphs: Aaron Lewis Mark Rankin
Answer: Aaron Lewis