In this task, you are given a set of context paragraphs, some supporting facts and an answer of a question. Your task is to generate question for given answer based on set of context paragraphs, supporting facts and an answer.

Context_1 : The Best of Howard Jones is a compilation album by the British pop musician Howard Jones. It compiles key hits and album tracks from 19831992 during Jones's tenure on the Warner music label, plus one new track, a cover of Donald Fagen's "I.G.Y. (What a Beautiful World)". It does not include his last UK Top 40 hit 'All I Want' from 1986. The album was a success, particularly in the UK where it was certified silver. Context_2 : 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. Context_3 : Giraffe Tongue Orchestra is an American rock supergroup. The band consists of Alice In Chains vocalist William DuVall, guitarist Brent Hinds of Mastodon, lead guitarist Ben Weinman of The Dillinger Escape Plan, drummer Thomas Pridgen of The Mars Volta, and bassist Pete Griffin of Dethklok and Zappa Plays Zappa. The band released their debut LP, "Broken Lines" on September 23, 2016. Context_4 : The Very Best of Howard Jones is a collection of Howard Jones's biggest hits between 1983 and 2003. It also contains one new track, "Revolution Of The Heart", in its original form. It would later be altered and featured on his 2005 album, "Revolution Of The Heart". The Very Best Of Howard Jones also came with a bonus disc of B-sides. The two-disc set featuring 36 synth-pop hits includes "New Song," "Everlasting Love," and the Phil Collins-produced version of "No One Is To Blame." Context_5 : Afrodiziak was a British singing group composed of Caron Wheeler, Claudia Fontaine, and later Naomi Thompson, that was active in the 1980s. As a duo, Wheeler and Fontaine were best known for performing backing vocals on The Jam's final single "Beat Surrender" in 1982 (with whom they also performed on their final tour) and Elvis Costello's 1983 album "Punch the Clock", especially its single, the international hit "Everyday I Write the Book". After the addition of a third member, Naomi Thompson, they went on to sing for acts such as Heaven 17 and Howard Jones. Afrodiziak performed backing vocals on the hit single Free Nelson Mandela, including the a cappella intro, staging it at The Tube (Channel4) in March 1984. Heaven 17's 1984 album, "How Men Are", featured them prominently, especially on the singles "Sunset Now" and "And That's No Lie". In 1984 and 1985 they performed on Madness's albums "Keep Moving" and "Mad Not Mad" respectively, also appearing in the video for the Madness single "Sweetest Girl". Also in 1985, they performed backing vocals on the first two songs on Howard Jones' second album, "Dream Into Action", both of which ("Things Can Only Get Better" and "Life in One Day") became worldwide hit singles; later that year, they went on tour as part of Jones' band. Other acts the group sang backup for include Japan, Ian Gillan, Aztec Camera, Maxi Priest, Aswad, Sam Brown, and Julia Fordham. Besides "The Tube", Afrodiziak also appeared on "Top of the Pops", "The Old Grey Whistle Test", "Solid Gold", and "American Bandstand". They performed live at the Montreux Jazz Festival, Live Aid Japan, Red Nose Day of Charity, and the first Free Nelson Mandela Concert. Context_6 : Howard Jones (born July 20, 1970) is an American metalcore vocalist, best known as vocalist of the bands Killswitch Engage and Blood Has Been Shed, and as the current vocalist of Light the Torch, formerly known as Devil You Know. Context_7 : Mastodon is an American heavy metal band from Atlanta, Georgia. Formed in 2000, the group is composed of bassist Troy Sanders, guitarists Brent Hinds and Bill Kelliher, and drummer Brann Dailor, all of whom perform vocals in studio (except Bill Kelliher). They all perform vocals at live shows. Their musical style features progressive concepts and unique instrumentation. Mastodon has released seven studio albums, as well as a number of other records. The band's debut album, "Remission", released in 2002, garnered significant critical acclaim for its unique sound. Mastodon's second full-length release, "Leviathan", is a concept album based on the novel "Moby-Dick" by Herman Melville. Three magazines awarded the record "Album of the Year" in 2004: "Revolver", "Kerrang!" and "Terrorizer". Context_8 : Premier Guitar is an American multimedia guitar company devoted to guitarists. Founded in 2007, it is based in Marion, Iowa, and has an editorial staff composed of experienced musicians. Content includes instructional material, guitar gear reviews, and guitar news. Interviews have included guitarists such as Pete Townshend of The Who, Ron Wood of the Rolling Stones, Joe Perry of Aerosmith, Guthrie Govan, Brent Hinds and Bill Kelliher of Mastodon, and Dave Mustaine and Chris Broderick of Megadeth. The magazine is published online for free, and includes multimedia such as instructional videos and podcasts. The magazine also has a free weekly newsletter and an online "Gear Search" service, where guitarists can search for, buy, and sell guitar equipment. As of March 2012, the magazine's print and multimedia platforms combined served 1.5 million unique readers per month, making it the most read magazine on this topic worldwide. Context_9 : "Days of Self Destruction" is a song by American rock band CKY. Written and produced by the band's vocalist and guitarsit Chad I Ginsburg, it features additional guitar by Mastodon's Brent Hinds. The track is featured on the band's 2017 fifth studio album "The Phoenix", and was released as the first single from the album on May 1, 2017. "Days of Self Destruction" is the first song released by CKY since its return in 2016 following the 2011 departure of original frontman Deron Miller. Context_10 : Troy Jayson Sanders (born September 8, 1973) is an American musician, singer, and songwriter best known as a member of the Atlanta, Georgia metal band Mastodon, in which he plays bass and shares lead vocal duties with guitarist Brent Hinds and drummer Brann Dailor. fact_1 : 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. fact_2 : Howard Jones (born July 20, 1970) is an American metalcore vocalist, best known as vocalist of the bands Killswitch Engage and Blood Has Been Shed, and as the current vocalist of Light the Torch, formerly known as Devil You Know. Answer: vocalist
What do Brent Hinds and Howard Jones have in common?