Question: Ian Hunter and Stuart Murdoch, have which musical occupation in common?

full_context: Document 1: The Ballad of Ian Hunter and Mott the Hoople: Shades of Ian Hunter: The Ballad of Ian Hunter and Mott the Hoople is a compilation album by Ian Hunter, consisting of tracks by Hunter's previous band Mott the Hoople, and solo Hunter tracks as well. It was released in 1979 as a double-LP.
Document 2: Stuart Murdoch (musician): Stuart Lee Murdoch (born 25 August 1968) is a Scottish musician, writer and filmmaker, and the lead singer and songwriter for the indie pop band Belle and Sebastian.
Document 3: Ian Gillan: Ian Gillan (born 19 August 1945) is an English singer and songwriter. He originally found commercial success as the lead singer and lyricist for Deep Purple.
Document 4: Morrissey: Steven Patrick Morrissey (born 22 May 1959), professionally known as Morrissey, is an English singer, songwriter and author. He rose to prominence as the lead singer of the indie rock band the Smiths, which was active from 1982 to 1987. Since then, Morrissey has had a solo career, making the top ten of the UK Singles Chart on ten occasions.
Document 5: Ian Hunter (album): Ian Hunter is the first solo album by Ian Hunter, recorded following his departure from Mott the Hoople. Released in 1975, it is also the first of many solo albums on which he collaborates with Mick Ronson. The bassist, Geoff Appleby, was from Hull like Mick Ronson and they had played together in The Rats in the late 1960s.
Document 6: Arab Strap (band): Arab Strap are a Scottish indie rock band whose core members are Aidan Moffat and Malcolm Middleton. The band were signed to independent record label Chemikal Underground, and split in 2006. As indicated by the title of Belle & Sebastian's third record, "The Boy with the Arab Strap", and by Aidan Moffat's involvement in the two Reindeer Section albums, they were a central part of Glasgow's influential late 1990s music scene.
Document 7: Stuart Murdoch (football manager): Stuart Murdoch (born September 2, 1955) is a football coach. He is perhaps best known for his spell as manager of Wimbledon between May 2002 and June 2004, during which time the team moved to Milton Keynes in 2003. Wimbledon were renamed Milton Keynes Dons by the new owner in 2004 and Murdoch remained in charge until November of that year.
Document 8: David Bowie: David Robert Jones (8 January 1947 – 10 January 2016), known professionally as David Bowie ( ), was an English singer, songwriter and actor. He was a leading figure in popular music for over five decades, acclaimed by critics and other musicians for his innovative work. His career was marked by reinvention and visual presentation, his music and stagecraft significantly influencing popular music. During his lifetime, his record sales, estimated at 140 million albums worldwide, made him one of the world's best-selling music artists. In the UK, he was awarded nine platinum album certifications, eleven gold and eight silver, releasing eleven number-one albums. In the US, he received five platinum and nine gold certifications. He was inducted into the Rock and Roll Hall of Fame in 1996.
Document 9: Scottish music (1980–1989): During the 1980s, Scottish music featured post-punk bands exemplified by Simple Minds and Josef K, and bands like Runrig that remained closer to the Scottish dance music tradition. Folk rock or Celtic rock bands launched in the 1980s included The Waterboys and The Proclaimers. Among the folk singers of the time were Dick Gaughan and Bill Drummond, and Ewan MacColl who died in 1989.
Document 10: Stuart Chatwood: Stuart Chatwood, (born 22 October 1969 in Fleetwood, Lancashire, England) is a Canadian musician, best known as the bass guitar and keyboard player for the rock band The Tea Party. The Tea Party are known for fusing together musical styles of both the Eastern and Western worlds, in what they call "Moroccan roll". In 2001, Chatwood won a Juno Award for the best artwork for a Tea Party album.
Document 11: Fish (singer): Derek William Dick (born 25 April 1958), better known by his stage name Fish, is a Scottish singer-songwriter and occasional actor. He achieved prominence as the lead singer and lyricist of the neo-progressive rock band Marillion from 1981 until 1988. In his solo career, Fish has explored contemporary pop and traditional folk.
Document 12: Ian Astbury: Ian Robert Astbury (born 14 May 1962) is an English singer and songwriter. He is best known as a founding member and the lead vocalist for the rock band The Cult.
Document 13: 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 14: Ian Hunter (singer): Ian Hunter Patterson (born 3 June 1939), known as Ian Hunter, is a British singer-songwriter who is best known as the lead singer of the English rock band Mott the Hoople, from its inception in 1969 to its dissolution in 1974, and at the time of its 2009 and 2013 reunions. Hunter was a musician and songwriter before joining Mott the Hoople, and continued in this vein after he left the band. He embarked on a solo career despite ill health and disillusionment with commercial success, and often worked in collaboration with Mick Ronson, David Bowie's sideman and arranger from the "Ziggy Stardust and the Spiders from Mars" period.
Document 15: 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.
ground_truth: lead singer