Question: What role in their respective bands links Brent Smith and Mike Score?

full_context: Document 1: Brent Hinds: Brent Hinds (born William Brent Hinds; January 16, 1974) is an American musician best known as a member of the Atlanta, Georgia metal band Mastodon, in which he shares guitar duties with Bill Kelliher and vocal duties with Troy Sanders and Brann Dailor.
Document 2: Mike Gatten: Mike Gatten (born July 15, 1965) is an American entrepreneur and inventor of the Miracle Blanket which is a comfortable stretchy blanket designed to help babies sleep comfortably. Before inventing the Miracle Blanket, Mike worked for a few different companies and was invested in some very lucrative business ventures. He then founded AMB Enterprises in 2003 to manufacture, sell and distribute the Miracle Blanket. "AMB" stood for "Amazing Miracle Blanket". And in 2009, he launched Miracle Fulfillment, LLC to distribute Miracle Industries, LLC products as well as shipping, distribution and fulfillment for national companies large and small. Along with having a successful career, Mike is also the executive producer and drummer for the popular New Mexico band, Chasing Disaster, which released its first album in January 2011. Chasing Disaster was nominated by the New Mexico Music Awards in the “Main Stream Rock” [sic?] category for its album "Bullet for a Rose". Mike is also a sculptor of life-sized, whimsical, mixed media sculptures sold in a prominent gallery in Los Angeles, CA. Mike, his wife Mindi and three children currently reside in Rio Rancho, NM.
Document 3: Mike Score: Michael Gordon "Mike" Score (born 5 November 1957) is an English musician. He is best known as the keyboardist, guitarist and lead singer of the new wave band, A Flock of Seagulls. He released a solo album on 1 March 2014 titled "Zeebratta".
Document 4: Zeebratta: Zeebratta is the debut album of Mike Score, the lead singer of A Flock of Seagulls. It was released on digital download on March 1, 2014, and will be later be released on physical copies. Two singles were released from the album, "All I Wanna Do" and "Somebody Like You".
Document 5: Tom Smith (musician): Thomas Michael Henry Smith (born 29 April 1981) is an English musician. He is the lead singer, lyricist, keyboardist and rhythm guitarist for the Birmingham-based indie rock band Editors.
Document 6: Jordan Smith (musician): Jordan Mackenzie Smith (born November 4, 1993) is an American singer and musician from Harlan, Kentucky. Smith began singing in his church choir and continued through his college education at Lee University where he was a member of the Lee Singers.
Document 7: Mick Hucknall: Michael James Hucknall (born 8 June 1960) is an English singer and songwriter. Hucknall achieved international fame in the 1980s as the lead singer and songwriter of the soul-influenced pop band Simply Red, with whom he enjoyed a 25-year career and sold over 50 million albums. Hucknall has been described as "one of the truly great blue-eyed soul singers".
Document 8: Brent Ashley: Brent Ashley is a bassist who is the current bassist for Combichrist and former bassist for The Natural Born Killers featuring Max Green of Escape The Fate. He is also a former member of Static-X and was also a part of Wayne Static's solo project band in support of his album Pighammer. Other past bands include The Dreaming, Orgy, Skold, Lacey Conner, September Mourning, Leisure, Davey Suicide, Psyclon Nine and Synical. Ashley and Green started a band called Violent New Breed. Their first album will be out in 2016.
Document 9: M. Shadows: Matthew Charles Sanders (born July 31, 1981), better known as M. Shadows, is an American singer, songwriter, and musician. He is best known as the lead vocalist, songwriter, and a founding member of the American heavy metal band Avenged Sevenfold. In 2017, he was voted 3rd in the list of Top 25 Greatest Modern Frontmen by Ultimate Guitar.
Document 10: Mike Lake (footballer): Mike Lake (born 16 November 1966 in Manchester) is an English retired footballer. After been a peripheral figure in his first few seasons at Sheffield United and hindered by injuries, Lake then featured more regularly in the early 1990's once United were back in the old First Division. Lakes time at United is best remembered during the 1991–92 season where he had a consistent spell in the team and scored 4 times in 4 games, all of which were opportunist and often spectacular. Lake with his distinctive long hair and sudden goal scoring streak became a cult-hero at United and as a result of the spectacular goals the Blades fans nicknamed Lake, Mike "Zico" Lake, after the famous Brazilian footballer Arthur Antunes Coimbra, better known as Zico. In particular, Lake is remembered at United for his long range goal against Southampton in a 4 - 2 victory at The Dell. The goal was also nominated for goal of the month and was described as a "Brazilian bender" by United's manager Dave Bassett. Lake also scored a second in the same match, again from long range, this time aided by a deflection.
Document 11: Michael Fall: Michael Fall, (born, Lokeren, June 9, 1980) is a Belgian DJ, producer, and remixer from Moerbeke-Waas, Belgium. Michael Fall is currently signed on different record labels worldwide. In the past he signed deals with major labels such as Universal Music Group, CNR Records in Belgium & ZYX Music records in Germany. He released many songs that have charted in Belgian and foreign charts. He ended his publishing contract with BMC Universal in November 2012 and signed a new publishing contract in November 2012 at the Dutch independent music publisher Strengholt Music Group. In 2013 he released his debut album called 'Turn on your radio' and was listed in the official Belgium album charts. Michael is owner of MFrecords based in Belgium and he owns a record store in Zelzate. In 2014 he received a golden award for his debut album. On 31 July 2015 he released his second album called 'Ain't nothing but a party'.
Document 12: Brent Smith: Brent Stephen Smith (born January 10, 1978), known professionally as Brent Smith, is an American singer, songwriter, and musician best known as the lead vocalist of the band Shinedown.
Document 13: Shinedown: Shinedown is an American rock band from Jacksonville, Florida. Formed by Brent Smith in 2001 after the dissolution of his prior band, Smith, still under contract with record label Atlantic Records, recruited the band's original lineup of Jasin Todd as guitarist, Brad Stewart on bass, and Barry Kerch on drums. Consistent for the first two album cycles, a few lineup changes followed in the late 2000s, eventually stabilizing with Smith and Kerch, as remaining members alongside newcomers Zach Myers on guitar, and Eric Bass on bass. The group has released five studio albums: "Leave a Whisper" (2003), "Us and Them" (2005), "The Sound of Madness" (2008), "Amaryllis" (2012), and "Threat to Survival" (2015). Shinedown has sold more than ten million records worldwide, and has had 11 number one singles on the "Billboard" Mainstream Rock charts, the third most of all-time, behind Van Halen and Three Days Grace.
Document 14: Mike Perry (DJ): Mikael Persson, better known by his stage name Mike Perry is a Swedish DJ and music producer from Skövde. He is best known for his 2016 single "The Ocean" featuring vocals from Shy Martin, which peaked at number 1 on the Swedish Singles Chart.
Document 15: Brendon Urie: Brendon Boyd Urie (born April 12, 1987) is an American singer, songwriter, musician and multi-instrumentalist. He is best known as the lead vocalist of Panic! at the Disco, of which he is the sole remaining original member.
ground_truth: lead vocalist