Question: The vocalist whose guitar work punctuated the music of Chiefs of Relief died from complications of what disease?

full_context: Document 1: Shannon Hamm: Shannon Hamm is a death metal guitarist who played in Death from 1996 until their break-up in 2001. He then joined Chuck Schuldiner's second band Control Denied, which ended with the death of Schuldiner in 2001. Before Death, he was a locally well known guitarist in the Texas underground metal scene. He was particularly good friends with "Dimebag" Darrell Abbott of Pantera and Damageplan. According to Abbott, Hamm "out shredded" Darrell in Pantera's glam metal days while Hamm was in a band named Metalstorm.
Document 2: Tim Wheeler: Timothy James Arthur Wheeler (born 4 January 1977), known as Tim Wheeler, is a Northern Irish guitarist, songwriter, and vocalist for the rock band Ash. He formed the band with Mark Hamilton and they were originally called Vietnam. Wheeler can be seen playing a Korina Gibson Flying V in almost all of Ash's music videos. He has written nearly all of their notable pieces such as "Oh Yeah", "Shining Light", "Girl From Mars", "Kung Fu", and "Goldfinger". In September 2014 Tim announced details of his debut solo album "Lost Domain" with a release date of 3 November 2014.
Document 3: Kaiser Chiefs: Kaiser Chiefs are an English indie rock band from Leeds who formed in 2000 as Parva, releasing one studio album, "22", in 2003, before renaming and establishing themselves in their current name that same year. Since their formation the band consists of lead vocalist Ricky Wilson, guitarist Andrew "Whitey" White, bassist Simon Rix, keyboardist and occasional drummer Nick "Peanut" Baines and since 2013 drummer Vijay Mistry, who replaced founding drummer Nick Hodgson who left the band in late 2012.
Document 4: 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 5: Kaiser Chiefs discography: The discography of Kaiser Chiefs, a British indie rock band, consists of six studio albums, one extended play, thirteen singles, and one video album. Kaiser Chiefs were formed in 1997 in Leeds, England by classmates Nick Hodgson (drums), Nick Baines (keyboards) and Simon Rix (bass). The trio were later joined by Andrew White (guitar) and Ricky Wilson (vocals).
Document 6: Matthew Ashman: Matthew James Ashman (3 November 1960 – 21 November 1995) was an English guitarist with Adam and the Ants and Bow Wow Wow. He died at age 35 after lapsing into a coma due to complications arising from diabetes in 1995.
Document 7: Man Raze: Manraze are a 3-piece alternative rock band from London, England, featuring Phil Collen, Simon Laffy and Paul Cook.
Document 8: Iain Cook: Iain Andrew Cook (born 2 November 1974) is a Scottish musician, composer, and record producer who is currently a member of Glasgow-based electronic trio Chvrches. He played guitar for the Scottish post-rock band Aereogramme until their breakup in 2007. Cook also composes music for film and television and is a member of the rock band The Unwinding Hours.
Document 9: Danny Spencer: Danny Spencer is the former guitarist for Rogue Traders, taking over from previous guitarist Tim Henwood, who left in order to concentrate on his band The Androids in 2007. With Rogue Traders frontman James Ash stating that "Tim Henwood will be leaving the Rogue Traders in the immediate future to concentrate on his own amazing band, The Androids" on the bands MySpace page.
Document 10: Paul Cook: Paul Thomas Cook (born 20 July 1956 in Hammersmith, London) is an English drummer and member of the punk rock band the Sex Pistols. He was also called "Cookie" by his friends on the punk music scene.
Document 11: Peter Asher: Peter Asher CBE (born 22 June 1944) is a British guitarist, singer, manager and record producer. He first came to prominence in the 1960s as a member of the pop music vocal duo Peter and Gordon, before going on to a successful career as a manager and record producer.
Document 12: Stuart Matthewman: Stuart Colin Matthewman (born 18 August 1960), also known as Cottonbelly, is an English songwriter, multi-instrumentalist, and record producer. With Sade Adu, Paul S. Denman, and Andrew Hale, he gained worldwide fame as the guitarist/saxophonist of the English band Sade. Stuart is also a member of bands, Sweetback and Twin Danger.
Document 13: Death of David Bowie: On 10 January 2016, English singer, songwriter and actor David Bowie died at his New York City apartment, having suffered from liver cancer for the previous 18 months. His death occurred two days after the release of his twenty-fifth studio album, "Blackstar", which coincided with his 69th birthday.
Document 14: Chiefs of Relief: Chiefs of Relief were a British rock group with a unique electro-punk style, punctuated by the guitar work of vocalist Matthew Ashman, and also featuring drummer Paul Cook. The Chiefs fused rock with hip hop and electronic elements from the era but it was as a live outfit that they excelled.
Document 15: The Chavs: The Chavs are a Rock supergroup formed in 2004, by former Libertines and Dirty Pretty Things guitarist Carl Barât. Alongside Barât in the band are Tim Burgess of The Charlatans, Primal Scream keyboardist Martin Duffy and drummer Andy Burrows from Razorlight. They made their live debut at Chatham's Tap'n'Tin, in December 2004, where the set included the Libertines songs "Death On the Stairs", "France" and "Road To Ruin", the Charlatans' "A Man Needs To Be Told" and "North Country Boy", Burgess' solo song "I Believe In The Spirit" and festive songs including a cover of "Fairytale of New York" by The Pogues.
ground_truth: diabetes