Question: What American heavy metal band from Los Angeles has Greg Wells produced and written with?
Context: Zoetrope was an American heavy metal band from Chicago, Illinois.  Although their sound was akin to thrash metal, the group described themselves as "Street Metal".  The group was formed in 1976 by teenage friends Barry Stern (drums/vocals), Kevin Michael Rasofsky, aka Kevin Michael, (guitar), and Calvin "Willis" Humphrey (bass), soon to be joined by second guitarist Ken Black.  Initially playing covers, the band soon ventured into writing their own material and released a single in 1980.  Although undeniably a metal band, Zoetrope was also active in Chicago's hardcore punk scene, sharing bills with locals hardcore bands and hanging out at O'Banions, a Chicago punk bar (Ken Black and Barry Stern also produced the self-titled LP by Chicago-based hardcore band Life Sentence in 1986).  Following the release of a couple of demo tapes, the group was signed to Combat Records and issued their first LP, "Amnesty", in 1985.  In 1987, the band traveled to Los Angeles to record their follow up, "A Life of Crime", with producer Randy Burns (Megadeth, Nuclear Assault).  During the recording sessions, Ken Black left the band and returned to Chicago to sort out substance abuse issues.  He was replaced by Louis Svitek.  Although Svitek appears on the album's cover, Kevin Michael later confirmed that Ken Black had finished his guitar parts before leaving Los Angeles.  During the tour supporting "A Life of Crime", Svitek was recruited for M.O.D. by Billy Milano.  After the tour, Barry Stern jumped ship to fellow Chicagoans Trouble.  Kevin Michael eventually returned with a new line up for 1993's "Mind Over Splatter" but the band folded for good soon after. Greg Wells is a Canadian multiple Grammy nominated musician, record producer and songwriter based in Los Angeles.  Wells has songs on over 85 million units sold.  He has produced and written with Adele, Dua Lipa, Keith Urban, Twenty One Pilots, Mika (singer), Rufus Wainwright, Katy Perry, Mayer Hawthorne,Theophilus London, Weezer, Kid Cudi, OneRepublic, Grace VanderWaal, Ariana Grande, Kelly Clarkson, Pink, Pharrell Williams, Rascal Flatts, Holychild, Ella Eyre, The All American Rejects, Otep, Deftones, Aerosmith, Burt Bacharach, Celine Dion, Crash Test Dummies, Elton John, Jars of Clay, and the Count Basie Orchestra. The Pursuit is the fifth studio album by Jamie Cullum.  It was released on 9 November 2009 in the United Kingdom, and released in the United States and Canada on 2 March 2010.  It was produced by Greg Wells and Martin Terefe, and mixed by Gregg Wells, Thomas Juth and Ryan Hewitt.  The album's title is taken from the novel "The Pursuit of Love" by Nancy Mitford.  The album was recorded at a Los Angeles studio using songs that Cullum originally recorded at his Shepherd's Bush recording studio, Terrified Studios.  The song "Mixtape" features Sophie Dahl on backing vocals. Kurdt Vanderhoof (born June 28, 1961) is an American guitarist, best known as the lead guitarist and founding member of the American heavy metal band Metal Church.  As early as 1976, in Aberdeen, Vanderhoof was ardently networking with local musicians and had formed a band called Tyr, which included Kirk Arrington on drums and Vanderhoof on rhythm guitar.  In 1978 Vanderhoof joined Seattle hardcore punk band The Lewd adopting the stage name "Blobbo" on bass guitar, switching instruments to guitar the following year.  The Lewd relocated from Seattle to San Francisco in 1980.  Following Vanderhoof's departure from The Lewd he formed Metal Church, named after a nickname given to his San Francisco apartment.  Vanderhoof moved back to his hometown, Aberdeen, Washington, with a vinyl single of Trash Can Baby as proof of his interlude with the Lewd.  In the summer of 1982, he formed a heavy metal cover band named Shrapnel.  It consisted of Tom Weber on drums, Duke Erickson on bass (both from Hoquiam), Mike Murphey ("muff", from Montesano) and a guitar player Vanderhoof had jammed with in high school(Aberdeen).  Shrapnel played four events to warm up, including a frat party at Pacific Lutheran University, after which the other guitar player quit, having had a religious experience, unwilling to cover The Number of The Beast by Iron Maiden.  His part was replaced by Craig Wells of Aberdeen, and Tom was eventually replaced by Kirk Arrington (also from Hoquiam) on drums.  When Mike Murphy left the band, they recruited David Wayne for vocal duties.  By 1983, Shrapnel had renamed itself to Vanderhoof's original band name, Metal Church. The Iron Maidens is an American heavy metal band from Los Angeles, California.  Formed in 2001 as an all-female tribute act to English heavy metal band Iron Maiden.  Considered the "World's Only Female Tribute to Iron Maiden," the band currently consists of vocalist Kirsten Rosenberg, bassist Wanda Ortiz, drummer Linda McDonald, guitarist Courtney Cox, and guitarist Nikki Stringfield, House of Secrets is the second album by the American heavy metal band Otep, produced by Greg Wells (Deftones, Rufus Wainwright, Mika), and released in 2004.  The album entered the "Billboard" 200 at number 93.  The video for the song "Warhead" made the top ten videos of 2004 on MTV's Headbanger's Ball.  This album has been released with the Copy Control protection system in some regions. W.A.S.P. is an American heavy metal band formed in 1982 by Blackie Lawless, who is the only remaining original member of the band.  They emerged from the same Los Angeles scene that spawned Van Halen, Mötley Crüe, Dokken, Ratt, Quiet Riot, Guns N' Roses, Great White, Stryper, L.A. Guns, Leatherwolf and others.  The band's popularity peaked in the 1980s, yet they continue to record and tour, making them one of the most enduring of the West Coast heavy metal bands.  W.A.S.P. gained notoriety for their shock rock-themed image, lyrics and live performances.  They have sold over 12 million copies of their albums. Maxxxwell Carlisle (Maxxxwell McHugh Carlisle) is an American Heavy Metal guitarist, songwriter, producer, radio personality and bodybuilder from Los Angeles, California.  He is the current guitarist in the American Heavy Metal bands Hellion and Society 1.  He is also known for his work as a solo artist, as the keyboardist/guitarist of Raptor Command, as a former member of the American Thrash band Deathriders, as the host of the weekly Maxed-Out Metal Hour Show on internet radio station Metal Express Radio, and for his collaborations with other notable musicians such as Michael Angelo Batio, Tina Guo, Nita Strauss, and Ethan Brosh. Otep is an American heavy metal band from Los Angeles, California, formed in 2000.  They have released two EPs, six studio albums, and one live album.  As of December 2013, they are no longer under their previous label Victory Records and currently are signed with Napalm Records. Omen is an American heavy metal band.  The band was formed in Los Angeles, California, in 1983, by lead guitarist Kenny Powell, previously with the band Savage Grace and signed on with Metal Blade in 1984, with whom they released their debut "Battle Cry" (which contained "The Axeman", which appeared on the soundtrack for the Heavy Metal themed 2009 video game "Brütal Legend").
Answer: Otep