Question: Bad Meets Evil was a duo that formed because of a mutual friend from what city?

full_context: Document 1: Elzhi: Jason Powers (born May 12, 1978), better known by his stage name eLZhi, is an American rapper from Detroit, Michigan. He is a former member of Slum Village and now records as a solo artist. In his youth, he made numerous visits to the Hip-Hop shop in Detroit, taking advantage of open-mic nights hosted by fellow Detroit rapper Proof. These sessions gave him the opportunity to be surrounded by Detroit's most talented MCs such as Obie Trice, Magestik Legend, Finale, Invincible, Phat Kat, Guilty Simpson, Royce da 59, One Be Lo, J Dilla, Baatin, D12 and even Eminem.
Document 2: Bad Meets Evil: Bad Meets Evil is an American hip hop duo composed of Detroit-based rappers, Royce da 5'9" (Bad) and Eminem (Evil). Bad Meets Evil was formed in 1997, thanks to the duo's mutual friend, Proof. Their discography consists of one extended play (EP) and four singles. In 1999, the duo released a double non-album single, "Nuttin' to Do" and "Scary Movies"; the former peaked at 36 on the Hot Rap Songs chart, while the latter peaked at 63 on the UK Singles Chart, and was featured on the soundtrack of the 2000 horror comedy parody film "Scary Movie".
Document 3: Hell: The Sequel: Hell: The Sequel is the debut extended play (EP) by Bad Meets Evil, an American hip hop duo composed of Royce da 5'9" and Eminem. It was released on June 13, 2011, in some countries, by Shady Records and Interscope Records and it was released on June 14, 2011 in the United States. The EP is hardcore hip hop and midwest hip hop, and contains songs such as "Welcome 2 Hell", "Above the Law" and "Loud Noises" featuring Slaughterhouse; these tracks includes the violent lyrical content, while trying to maintain a humorous tone. "Fast Lane", "A Kiss" and "The Reunion" features the sexual themes. "I'm on Everything" featuring Mike Epps, is a humorous song about drugs, while "Lighters" featuring Bruno Mars, and "Take from Me" features its focus on more serious themes such as success and music piracy.
Document 4: Royce da 5'9&quot;: Ryan Daniel Montgomery (born July 5, 1977), better known by his stage name Royce da 5′9″, is an American rapper from Detroit, Michigan. He is best known for his longtime association with Eminem as well as his solo career, recording primarily with producers Carlos "6 July" Broady and DJ Premier, as well as ghostwriting for the likes of Diddy and Dr. Dre. Royce is one half of the rap duo Bad Meets Evil with Eminem, one quarter of the hip hop group Slaughterhouse with Joe Budden, Joell Ortiz and Crooked I, and one half of the hip hop group PRhyme with DJ Premier. The editors of About.com ranked him No. 30 on their list of the Top 50 MCs of Our Time (1987–2007).
Document 5: D12 World: D12 World is the second studio album by Detroit hip hop group D12, released on April 27, 2004. The album sold 544,000 copies in its first week on the U.S. Billboard 200. The album is the last D12 album to feature Proof before his death in 2006, and the second D12 album to feature "Bugz" on a track.
Document 6: I Miss the Hip Hop Shop: I Miss the Hip Hop Shop is the debut studio album by Detroit rapper Proof, released on June 15, 2004 via Iron Fist Records.
Document 7: Fast Lane (Bad Meets Evil song): "Fast Lane" is the lead single by hip hop duo Bad Meets Evil, a group composed of Royce da 5'9" and Eminem, from their first EP "". The single was produced by Eminem, Supa Dups, and Jason "JG" Gilbert, and released on May 3, 2011 by Shady Records. Texas rapper Chamillionaire released a remix. A music video by director James Larese of music video direction group Syndrome. The music video features animated visuals and kinetic typography, with cameo appearances by Mr. Porter and Slaughterhouse. Fans and critics considered it a return to Eminem's Slim Shady alter ego.
Document 8: Proof (rapper): DeShaun Dupree Holton (October 2, 1973 – April 11, 2006), better known by his stage name Proof, was an American rapper and actor from Detroit, Michigan. During his career, he was a member of the groups 5 Elementz, Funky Cowboys, Promatic, Goon Sqwad and most notably, D12. He was a close childhood friend of rapper Eminem, who lived on the same block, and was often a hype man at his concerts. In 2006, Proof was shot and killed during an altercation at the CCC nightclub in Detroit.
Document 9: Lighters (song): "Lighters" is a song by American hip hop duo Bad Meets Evil, a group composed of Royce da 5'9" and Eminem, from their first EP, "". The track features American singer-songwriter Bruno Mars. It was written by Bad Meets Evil, along with Mars, Philip Lawrence and Ari Levine of The Smeezingtons, and Roy Battle. The production was handled by all aforementioned names, except Royce. It was released on June 14, 2011 by Shady and Interscope Records, being later serviced to mainstream radio airplay in the United States by the two latter labels along with Aftermath Entertainment as the second single from the EP. After writing and recording their own verses for the song, Eminem and Royce da 5'9" met Mars in Los Angeles, and the singer's vocals were added after minor adjustments were done by him and Eminem to the original cut.
Document 10: D12: D12, an initialism for The Dirty Dozen, is an American hip hop group from Detroit, Michigan. D12 has had chart-topping albums in the United States, United Kingdom, and Australia. D12 was formed in 1996, and achieved mainstream success after Eminem rose to international fame. The original lineup consisted of the members and their alter egos. This is where Slim Shady came from. D12 released the album "Devil's Night" in 2001 and "D12 World" in 2004, spawning numerous hits such as "Fight Music", "Purple Pills", "My Band", "How Come" and "Shit on You" throughout that period. Since 2006, Eminem's hiatus and the death of the member Proof resulted in them being less active in subsequent years.
Document 11: Mr. Porter: Denaun Porter (born December 7, 1978), also known by the stage names Mr. Porter and Kon Artis, is an American rapper and record producer. He was best known as a member of Detroit rap group D12, until his departure in 2012, to focus on his solo career as a producer and rapper. In 2014 he rejoined D12 and was featured on the "Shady XV" album.
Document 12: Nuttin' to Do: "Nuttin' to Do" / "Scary Movies" is the first single by hip hop duo Bad Meets Evil, composed of Detroit rappers Eminem and Royce da 5'9", released on October 1, 1999 by Game Recordings. A year later, Bad Meets Evil would break up and Eminem would go on to work with D12 and Royce Da 5'9" would work on solo projects. Royce took "Nuttin' to Do" for his album "Build and Destroy", and he also featured the sequel to "Scary Movies" as a solo song on it called "Scary Movies (The Sequel)". "Scary Movies" was also featured on the soundtrack to the 2000 film "Scary Movie".
Document 13: Dolla (rapper): Roderick Anthony Burton II (November 25, 1987 – May 18, 2009), better known by his stage name Dolla, was an American hip hop recording artist from Atlanta, Georgia. Burton embarked on his music career in 2000, with hip hop group Da Razkalz Cru, under the pseudonym Bucklyte. The group quickly disbanded, and Burton went on to work as a model for the Sean John clothing line. In 2007, Burton signed to Akon's Konvict Muzik label. Burton released three singles from 2007 to 2009. The first, his commercial debut single "Who the Fuck is That?", featuring Akon and T-Pain, charted on the "Billboard" Hot 100. On May 18, 2009, Burton was shot to death at the valet stand of the Beverly Center shopping mall in Los Angeles, and Aubrey Berry was arrested for his murder. Berry was acquitted on all charges.
Document 14: Bugz: Karnail Paul Pitts (January 5, 1977 – May 21, 1999), better known by his stage name Bugz, was an American underground rapper from Detroit, Michigan and a member of the group D12 from 1996 to 1999. He became one of the first to join the burgeoning D12 crew He was also a solo hip hop artist. Bugz was also known by his alter-ego "Robert Beck." He released his first EP in 1999 called "These Streets EP". Bugz also appeared on DJ Carl's 1999 album "The Art of Invisibility" in which he rapped on the "Detroit Detroit" interlude. Most of Bugz's solo work was in 1999, but several recordings from 1999 of him performing with other raps such as 5150 and M.O.B. were released on various album. Bugz's first solo album called "Mr. Obnoxious" was released in February 2000 posthumously, with appearances from Eminem, 5150, Proof, Swifty McVay, and Bizarre. In 2004, DJ Butter hosted a posthumous mixtape called "DJ Butter Presents: Bugz, One Man Mob".
Document 15: Rock City (song): "Rock City" is a song by American rapper Royce da 5'9", released as the third single from his debut album, "Rock City (Version 2.0)", which was released in 2002 through E1 Music (formerly "Koch Records") and Game Recordings, after another record label had turned down his first version of the album. The song also features vocals from rapper Eminem, becoming Eminem's debut appearance on one of Royce's solo albums. The single was released on January 5, 2002, the same date as its same titled album was released. "Rock City" charted at #99 on the Hot R&B/Hip-Hop Singles & Tracks chart in 2002. Not counting Bad Meets Evil or Slaughterhouse songs, "Rock City" is Royce da 5'9"'s most successful single chart-wise.
ground_truth: Detroit