Question: Are David Coverdale and Burton C. Bell both founders or co-founders of a band?

full_context: Document 1: Chuck Billy (vocalist): Charles "Chuck" Billy (born June 23, 1962) is an American vocalist, who is best known as the lead vocalist for the thrash metal band Testament.
Document 2: Jimmy Page: James Patrick Page, {'1': ", '2': ", '3': ", '4': "} (born 9 January 1944) is an English musician, songwriter, and record producer who achieved international success as the guitarist and founder of the rock band Led Zeppelin.
Document 3: List of band members in David Coverdale's bands: David Coverdale is best known for his band Whitesnake. Whitesnake emerged when Coverdale wanted to name his backing band on tour, before becoming a device for him to promote himself with though it remained his backing band and not a band in its own right. Later Coverdale would return to solo work and would also work with Jimmy Page on a project. Aside from Coverdale himself, there was a number of other overlaps in membership of these various groups. To construct an accurate chronology of his backing band therefore, the line-ups for David Coverdale Band, Whitesnake and Coverdale-Page have been included.
Document 4: Coverdale•Page (album): Coverdale•Page is an album by Whitesnake lead vocalist David Coverdale and former Led Zeppelin and London session guitarist Jimmy Page (as Coverdale•Page), released by Geffen Records on 15 March 1993. The album was recorded at Little Mountain Sound Studios in Vancouver, Criteria Studios in Miami, Highbrow Productions in Nevada and Abbey Road Studios, London. Recording commenced in the fall of 1991 and concluded in early 1992. It was produced by Jimmy Page, David Coverdale and Canadian record producer, Mike Fraser.
Document 5: Burton C. Bell: Burton Christopher Bell (born February 19, 1969) is an American musician and vocalist. Bell is best known as co-founder and frontman of the metal band Fear Factory. His singing style mixes clean and shouted vocals with death growls.
Document 6: Chuck Schuldiner: Charles Michael Schuldiner (May 13, 1967 – December 13, 2001) was an American singer, songwriter, and guitarist. He founded the pioneering band Death in 1983. Schuldiner is often referred to as "The Godfather of Death metal",
Document 7: David Coverdale: David Coverdale (born 22 September 1951) is an English rock singer best known for his work with Whitesnake, a hard rock band he founded in 1978. Before Whitesnake, Coverdale was the lead singer of Deep Purple from 1973 to 1976, after which he established his solo career. A collaboration with Jimmy Page resulted in a 1993 album that was a commercial and critical success. In 2016, Coverdale was inducted into the Rock and Roll Hall of Fame as a member of Deep Purple, giving one of the band's induction speeches.
Document 8: List of Whitesnake band members: Whitesnake are a British hard rock band originally from Middlesbrough. Formed in 1978, initially as vocalist David Coverdale's backing band, the group originally featured guitarists Micky Moody and Bernie Marsden, bassist Neil Murray, drummer Dave Dowle and keyboardist Peter Solley, who released their first EP "Snakebite" in 1978. Solley was replaced later in the year by Coverdale's former Deep Purple bandmate Jon Lord, while the group's drummer Ian Paice replaced Dowle in 1979 after the release of "Lovehunter". Whitesnake was briefly put on hiatus in 1982, before returning later in the year with Mel Galley, Colin Hodgkinson and Cozy Powell in place of Marsden, Murray and Paice. Shortly after the recording of "Slide It In", Hodgkinson was replaced by the returning Murray, while John Sykes also joined the band; both new members featured on the US reissue of the album, which featured re-recorded tracks. Both Galley and Lord left the band shortly after the album's release.
Document 9: Coverdale•Page: Coverdale•Page was a musical collaboration featuring Whitesnake and former Deep Purple lead vocalist David Coverdale, and former Led Zeppelin guitarist Jimmy Page.
Document 10: Mike Patton: Michael Allan "Mike" Patton (born January 27, 1968) is an American musician, singer, songwriter, actor, record producer, multi-instrumentalist and film composer, best known as the lead singer of the alternative metal band Faith No More. Patton was also the founder and lead singer of Mr. Bungle, and has played with Tomahawk, Fantômas, Lovage, The Dillinger Escape Plan, and Peeping Tom.
Document 11: Come Taste the Band: Come Taste The Band is the tenth studio album by the English rock band Deep Purple, originally released in October 1975. It was co-produced and engineered by the band and longtime associate Martin Birch. It is the only Deep Purple studio record featuring Tommy Bolin, who replaced Ritchie Blackmore on guitar and is also the final of three albums to feature Glenn Hughes on bass and David Coverdale on lead vocals, before Coverdale later left to form Whitesnake.
Document 12: White Snake (album): White Snake is the first solo album by David Coverdale, released in 1977. Coverdale would use the album title as the name of his future band, first known as "David Coverdale's Whitesnake" and soon afterwards shortened to Whitesnake.
Document 13: Thomas Gabriel Fischer: Thomas Gabriel Fischer (born 19 July 1963), also known by his stage names of Tom G. Warrior and Satanic Slaughter, is a Swiss metal musician. He is considered to be one of the pioneers of the death metal style of singing, which resembles guttural growling. He led the groups Hellhammer and Celtic Frost, and today is the frontman of the band Triptykon.
Document 14: Eric Burdon: Eric Victor Burdon (born 11 May 1941) is an English singer-songwriter and rocker best known as a member and vocalist of the R&B/rock band The Animals and the funk band War. He is regarded as one of the British Invasion's most distinct singers with his deep, searingly powerful blues-rock voice. He is also known for his aggressive stage performances.
Document 15: Carl Bell (musician): Carl Bell (born January 9, 1970) is an American musician, producer, arranger, engineer and mixer. He founded the multi-Platinum selling hard rock band Fuel. Bell was the principal songwriter (music and lyrics) for the band and performed guitar and backing vocals from the band's inception in 1994 until his departure in 2010. He has penned hit singles such as "Shimmer", "Hemorrhage (In My Hands)", and "Bad Day" as well as many other songs. He also co-produced all Fuel records including the Grammy nominated Natural Selection.
ground_truth: yes