Question: Are Mikael Åkerfeldt and Lee Ranaldo both lead vocalist?

full_context: Document 1: Thurston Moore: Thurston Joseph Moore (born July 25, 1958) is an American musician best known as a singer, songwriter and guitarist of Sonic Youth. He has also participated in many solo and group collaborations outside Sonic Youth, as well as running the Ecstatic Peace! record label. Moore was ranked 34th in "Rolling Stone"' s 2004 edition of the "100 Greatest Guitarists of All Time." In May 2012, "Spin" published a staff-selected top 100 ranking Moore and his Sonic Youth bandmate Lee Ranaldo together on number 1.
Document 2: Scriptures of the Golden Eternity: Scriptures of the Golden Eternity is a solo album by guitarist Lee Ranaldo, who also performs in rock band Sonic Youth. It was released on vinyl by the Father Yod label, and later reissued on CD by the Drunken Fish label. The cover design is by visual artist Savage Pencil. The album consists of three untitled tracks featuring a solo Ranaldo performing guitar, tape loops, and occasional vocal. The first was recorded on 18 July 1988, and the remaining two were recorded on 28 November 1989.
Document 3: Lee Ranaldo: Lee Mark Ranaldo (born February 3, 1956) is an American musician, singer-songwriter, guitarist, writer, visual artist and record producer, best known as a co-founder of the alternative rock band Sonic Youth. In 2004, "Rolling Stone" ranked Ranaldo at number 33 on its "Greatest Guitarists of All Time" list. In May 2012, "Spin" published a staff selected top 100 guitarist list, ranking Ranaldo and his Sonic Youth bandmate Thurston Moore together at number 1.
Document 4: Bloodbath over Bloodstock: Bloodbath over Bloodstock is a live DVD by Swedish death metal band Bloodbath. It features the entire live set the band played at Bloodstock Open Air in August 2010. It was filmed by the production company The Dark Box. It was released on April 25, 2011, by Peaceville Records. This is the final release with Mikael Åkerfeldt in the band as he quit in 2012.
Document 5: Opeth: Opeth is a Swedish heavy metal band from Stockholm, formed in 1989. The group has been through several personnel changes, but lead vocalist, guitarist and songwriter Mikael Åkerfeldt has remained Opeth's primary driving force throughout the years. Opeth has consistently incorporated progressive, folk, blues, classical and jazz influences into its usually lengthy compositions, as well as strong influences from death metal, especially in their early works. Many songs include acoustic guitar passages and strong dynamic shifts, as well as both death growls and clean vocals. Opeth is also well known for their incorporation of Mellotrons in their work. Opeth rarely made live appearances supporting their first four albums; but since conducting their first world tour after the 2001 release of "Blackwater Park", they have led several major world tours.
Document 6: Sonic Youth: Sonic Youth was an American rock band from New York City, formed in 1981. Founding members Thurston Moore (guitar, vocals), Kim Gordon (bass guitar, vocals, guitar) and Lee Ranaldo (guitar, vocals) remained together for the entire history of the band, while Steve Shelley (drums) followed a series of short-term drummers in 1985, and rounded out the core line-up. In their early career Sonic Youth were associated with the no wave art and music scene in New York City. Part of the first wave of American noise rock groups, the band carried out their interpretation of the hardcore punk ethos throughout the evolving American underground that focused more on the DIY ethic of the genre rather than its specific sound.
Document 7: Lou Reed: Lewis Allan Reed (March 2, 1942 – October 27, 2013) was an American musician, singer and songwriter. He was the guitarist, vocalist, and principal songwriter of the Velvet Underground, and his solo career spanned five decades. The Velvet Underground had little success during their active years, but later gained a significant cult following to become one of the most widely acclaimed and influential bands in rock history. Brian Eno famously stated that, while the Velvet Underground's debut album sold only 30,000 copies, "everyone who bought one of those 30,000 copies started a band".
Document 8: Storm Corrosion: Storm Corrosion was a musical collaboration between Mikael Åkerfeldt of Swedish progressive metal band Opeth and Steven Wilson, an English solo artist and frontman of the progressive rock band Porcupine Tree. Åkerfeldt and Wilson began a longstanding musical partnership in 2001 when Wilson produced Opeth's fifth studio album "Blackwater Park". The two began writing together for a new project in 2010, releasing their self-titled first studio album on May 8, 2012 through Roadrunner Records.
Document 9: Mikael Åkerfeldt: Lars Mikael Åkerfeldt (born 17 April 1974) is a Swedish musician, prominently known as the lead vocalist, guitarist, and primary songwriter of progressive death metal band Opeth, as well as being the former vocalist of death metal supergroup Bloodbath. He was also guitarist for the "one-off" band Steel, and is part of the collaboration Storm Corrosion with Steven Wilson.
Document 10: From Here to Infinity: From Here to Infinity (rendered on the cover and label art as From Here → Infinity) is the first solo album by Sonic Youth guitarist/songwriter Lee Ranaldo. The album consists of several compositions performed by Ranaldo with guitar, amplifier feedback, and guitar stompbox effects recorded onto extended tape loops.
Document 11: Sörskogen: Sörskogen was a Swedish progressive rock project Mikael Åkerfeldt of Opeth and Dan Swanö started for fun. Both musicians are known for their wide musical interests. The project was supposedly named after a small community near the Stockholm suburb Huddinge where Mikael practiced with his first band Eruption in the late 1980s. At the Opeth concert on December 18, 2008, Mikael Åkerfeldt claimed to have played soccer for the Sörskogen IF soccer club. Sörskogen is heavily influenced by 1970s prog rock bands, Camel to name but one. Not much is known about the project, except a few references made by Mikael in interviews.
Document 12: Amarillo Ramp (For Robert Smithson): Amarillo Ramp (For Robert Smithson) is a studio album by Sonic Youth's Lee Ranaldo. This album was for Robert Smithson, whose work as an artist was influential on Lee's artwork. "Isolation" is a cover of the John Lennon song.
Document 13: Clouds (Lee Ranaldo album): Clouds is an album by Sonic Youth guitarist/vocalist Lee Ranaldo. The album is a reworked recording of the concert performed by Ranaldo & William Hooker at the 1997 edition of the Festival International de Musique Actuelle de Victoriaville.
Document 14: Michael Locher: Michael Locher (a.k.a. "Vorphalack", or simply "Vorph") (born 7 January 1969) is a Swiss musician who provides vocals and is a guitarist for Swiss industrial/black metal band Samael. He co-founded the band in 1987 with his brother Alexandre Locher (also known as "Xytras" or "Xy") on drums. Michael's musical influences include Celtic Frost, Slayer, Iron Maiden, Motörhead, Venom, Bathory, and early Possessed. Michael particularly points to Bathory as a source of inspiration for vocals:
Document 15: Michael Amott: Michael Amott (born 28 July 1969) is a Swedish guitarist, songwriter, founding member of the bands Arch Enemy, Spiritual Beggars, and Carnage, as well as a former member of the grindcore band Carcass. He is the older brother of Christopher Amott. Some major influences in his music have been Tony Iommi, Michael Schenker, Uli Jon Roth and Dave Mustaine.
ground_truth: no