Question: Were Ronnie Van Zant and Mick Jones both lead singers of a band?

full_context: Document 1: Ronnie Van Zant: Ronald Wayne Van Zant (January 15, 1948 – October 20, 1977) was an American lead vocalist, primary lyricist, and a founding member of the Southern rock band Lynyrd Skynyrd. He was the older brother of two other rock vocalists: current Lynyrd Skynyrd lead vocalist Johnny Van Zant, and Donnie Van Zant, the founder and vocalist of 38 Special. He was the father of singer Tammy Van Zant, and cousin of musician Jimmie Van Zant.
Document 2: Mick Thomson: Michael Gordon "Mick" Thomson (born November 3, 1973), is an American heavy metal musician. Born in Des Moines, Iowa, he is best known as one of two guitarists in Slipknot, in which he is designated #7. Thomson originally met founding Slipknot members Anders Colsefni, Donnie Steele and Paul Gray through their mutual involvement in death metal band Body Pit, and later replaced Craig Jones in the group in 1996. Following the departure of Joey Jordison in 2013, Thomson is now the third longest-serving member of Slipknot.
Document 3: Steve Jones (musician): Stephen "Steve" Philip Jones (born 3 September 1955) is an English rock guitarist, singer and actor, best known as a guitarist with the Sex Pistols. Following the split of the Sex Pistols he formed The Professionals with former bandmate Paul Cook. He has also released two solo abums, and worked with the likes of Johnny Thunders, Iggy Pop, Bob Dylan and Thin Lizzy. In 1995, he formed the short lived supergroup Neurotic Outsiders with members of Guns N' Roses and Duran Duran. Jones was ranked in "Rolling Stone"' s list of the "100 Greatest Guitarists of All Time".
Document 4: Lynyrd Skynyrd 1991: Lynyrd Skynyrd 1991 is the sixth studio album by American Southern rock band, Lynyrd Skynyrd, and is the first album with the new members of the band - Johnny Van Zant and Randall Hall - and the first to feature Ed King since "Nuthin' Fancy", who replaced the three who had died since the band's last release - Ronnie Van Zant and Steve Gaines in the 1977 plane crash; Allen Collins in 1990 from chronic pneumonia. This was the last album to feature drummer Artimus Pyle.
Document 5: Danny Jones: Danny Jones (born 12 March 1986) is a British musician who is one of the lead vocalists and guitarists for pop-rock band McFly. Jones' fellow band members are Tom Fletcher (guitar and vocals), Dougie Poynter (bass and vocals), and Harry Judd (drums).
Document 6: Ronnie Van Zant Memorial Park: The Ronnie Van Zant Memorial Park is a public memorial park located in Lake Asbury, Clay County, Florida. The park was built in memory of Ronnie Van Zant, vocalist of Southern rock group Lynyrd Skynyrd, who died along with numerous other band members and crew in a 1977 plane crash. The park was funded by fans and family of the band, and features a number of facilities including tennis courts, fishing ponds, a disc golf course and picnic areas.
Document 7: Bernard Rhodes: Bernard Rhodes is a fashion designer, record producer, songwriter, manager and impresario who was integral to the development of the punk rock scene in the United Kingdom during the middle 1970s. He is most associated with two of the UK's best known punk bands, the Sex Pistols and The Clash. It was Rhodes who was responsible for discovering John Lydon and arranging the audition in the King's Road for him to join the Sex Pistols. He also introduced a young Mick Jones and Paul Simonon to Joe Strummer and together with Keith Levene they formed The Clash. Rhodes was an important force behind The Clash, not only managing their business, but also handling marketing and creative direction of the band. He left the band from 1979 to 1981 to pursue other opportunities, but tensions in the band led to singer-guitarist Joe Strummer demanding (and getting) his return in 1981.
Document 8: Southern by the Grace of God: Southern by the Grace of God is a live album by southern rock band Lynyrd Skynyrd, this live concert was a tribute by Lynyrd Skynyrd to the members of the band who had died in the 1977 plane crash. The plane crash killed frontman Ronnie Van Zant, guitarist Steve Gaines, backing vocalist Cassie Gaines and road manager Dean Kilpatrick. This is the first album produced by the band after the '77 plane crash. The band's lineup was re-worked into a second-generation Skynyrd. The changes include: Johnny Van Zant, younger brother of Ronnie Van Zant, taking over on vocals, Ed King, who departed the band during a 1975 tour and Randall Hall, who replaced the paralyzed Allen Collins. The three (King, Hall along with founding member Gary Rossington) re-form the famous triple-lead guitar attack of the original band. New background vocalists Carol Bristow and Dale Krantz-Rossington were added to take the place of the original Honkettes.
Document 9: Mick Jones (The Clash guitarist): Michael Geoffrey "Mick" Jones (born 26 June 1955) is a British musician, singer and songwriter best known as the lead guitarist, co-lead vocalist, cofounder and songwriter for The Clash until his dismissal in 1983. Afterwards, he formed the band Big Audio Dynamite with Don Letts. Jones has recently played with the group Carbon/Silicon along with Tony James and has toured the world as part of the Gorillaz live band. In late 2011, Jones collaborated with Pete Wylie and members of The Farm to form The Justice Tonight Band.
Document 10: Short Back 'n' Sides: Short Back 'n' Sides is the fifth solo album of Ian Hunter. Unsure of which direction he should take, Ian Hunter finally decided to collaborate with Mick Jones, who gave Hunter's songs a tougher and heavier touch. Fellow Clash member Topper Headon as well as Mick Ronson, Todd Rundgren and Ellen Foley also appeared on this album.
Document 11: Van Zant: Van Zant is an American musical duo composed of brothers Donnie Van Zant and Johnny Van Zant. Both are brothers of the late Ronnie Van Zant, former lead singer for the Southern rock band Lynyrd Skynyrd. Johnny became the lead vocalist for the reunited Lynyrd Skynyrd in 1987, and Donnie was also the leader and vocalist of .38 Special.
Document 12: The Style Council: The Style Council were an English band formed in 1983 by Paul Weller, the former singer, songwriter, and guitarist with the punk rock/new wave/mod revival band The Jam, and keyboardist Mick Talbot, previously a member of Dexys Midnight Runners, The Bureau and The Merton Parkas. The band enabled Weller to take a more soulful direction with his music.
Document 13: Johnny Van Zant: John Roy "Johnny" Van Zant (born February 27, 1959) is an American musician and the current lead vocalist of Southern rock band Lynyrd Skynyrd. He is the younger brother of the late Lynyrd Skynyrd co-founder and former lead vocalist Ronnie Van Zant, and of the 38 Special founder, Donnie Van Zant.
Document 14: Donnie Van Zant: Donald Newton "Donnie" Van Zant (born June 11, 1952, in Jacksonville, Florida) is an American rock vocalist/guitarist. He is best known for being a member of the band 38 Special, from its formation in 1974 until 2013. He is the middle of three brothers: his older brother Ronnie was the original lead singer for Lynyrd Skynyrd who died in a 1977 plane crash in Mississippi along with five other members and associates of the band; his younger brother Johnny is the current Lynyrd Skynyrd's lead singer since 1987. Donnie and Johnny also perform together from time to time as the group Van Zant.
Document 15: Joe Strummer: John Graham Mellor (21 August 1952 – 22 December 2002), known by his stage name Joe Strummer, was an English musician, singer, actor and songwriter who was the co-founder, lyricist, rhythm guitarist and lead vocalist of the Clash, a punk rock band formed in 1976 as part of the original wave of British punk.
ground_truth: yes