Question: Graeme Strachan and Dan Andriano, have which mutual occupations?

full_context: Document 1: Graeme Strachan: Graeme Ronald Strachan (2 January 195229 August 2001), professionally billed and known as "Shirley" Strachan or Shirl, was an Australian singer, songwriter, radio and television presenter, and carpenter. He was the lead singer of the rock group Skyhooks (1974–1978, 1983, 1984, 1990, 1994). While still a member of Skyhooks he had solo singles, which charted on the Kent Music Report, with cover versions of "Every Little Bit Hurts" (October 1976, No. 3) and "Tracks of My Tears" (July 1977, top 20). After leaving Skyhooks in July 1978 he concentrated on his solo career. He was the host of "Shirl's Neighbourhood" (1979–83), a children's TV show. From 1993 he appeared on home renovation TV program, "Our House", as a carpenter and co-host. At the ARIA Music Awards of 1993, Skyhooks were inducted into the ARIA Hall of Fame. Strachan died in 2001 in a self-piloted helicopter accident.
Document 2: Dan Spitz: Daniel Alan Spitz (born January 28, 1963) is an American musician and watchmaker best known for his work as the lead guitarist, principal songwriter and co-producer of the American heavy metal band Anthrax from 1983 to 1995 and from 2005 to 2008. With Anthrax, Spitz was nominated for three Grammy awards and has been awarded platinum and multiple platinum RIAA certified albums for his entire Anthrax catalog of work. Dan Spitz is the first heavy metal songwriter to have his music playing on two planets. NASA chose his song alongside only 9 other artists such as Frank Sinatra and the Beatles to be played on the Lunar Rover Curiosity making him the first heavy metal artist to have a top 10 charting song on two planets. Spitz also founded the Christian music group Red Lamb alongside Dave Mustaine of Megadeth as his writing partner, the first to bring autism awareness into any genre of music or music video.
Document 3: Skyhooks (band): Skyhooks were an Australian rock band formed in Melbourne in March 1973 by mainstays Greg Macainsh on bass guitar and backing vocals, and Imants "Freddie" Strauks on drums. They were soon joined by Bob "Bongo" Starkie on guitar and backing vocals, and Red Symons on guitar, vocals and keyboards; Graeme "Shirley" Strachan became lead vocalist in March 1974. Described as a glam rock band, because of flamboyant costumes and make-up, Skyhooks addressed teenage issues including buying drugs "Carlton (Lygon Street Limbo)", suburban sex "Balwyn Calling", the gay scene "Toorak Cowboy" and loss of girlfriends "Somewhere in Sydney" by namechecking Australian locales. According to music historian, Ian McFarlane "[Skyhooks] made an enormous impact on Australian social life".
Document 4: Daniel Johns: Daniel Paul Johns (born 22 April 1979) is an Australian musician, singer, and songwriter. Best known as the former front man of the rock band Silverchair, Johns is also one half of The Dissociatives with Paul Mac and, in 2007, was ranked at number 18 on "Rolling Stone"' s list of The 25 Most Under-rated Guitarists.
Document 5: Sherbet (band): Sherbet (aka Highway or The Sherbs) are one of the most prominent and successful Australian rock bands of the 1970s. The 'classic line-up' of Daryl Braithwaite on vocals, Tony Mitchell on bass guitar, Garth Porter on keyboards, Alan Sandow on drums, and Clive Shakespeare on guitar provided their teen-orientated pop style. In 1976 Shakespeare left and was soon replaced by Harvey James. Sherbet's biggest singles were "Summer Love" (1975) and "Howzat" (1976), both reaching number one in Australia. "Howzat" was also a top 5 hit in the United Kingdom. The band was less successful in the United States, where "Howzat" peaked at No. 61. As The Sherbs they also reached No. 61 in 1981 with "I Have the Skill". The group disbanded in 1984. Subsequent re-unions have occurred since 1998.
Document 6: Alkaline Trio discography: The discography of Alkaline Trio, a Chicago-based punk rock band, consists of nine studio albums, two compilation albums, one split album, four EPs, one video album, sixteen singles, one demo, nine digital releases, and thirteen music videos. Alkaline Trio formed in 1996 with an initial lineup of Matt Skiba (guitar, vocals), Rob Doran (bass guitar, backing vocals), and Glenn Porter (drums). This lineup released the band's demo tape and the 1997 single "Sundials" on Chicago record label Johann's Face Records, after which Doran left the band and was replaced by Dan Andriano. The group then signed to Asian Man Records and released their debut EP "For Your Lungs Only" and album "Goddamnit" in 1998. A second EP, "I Lied My Face Off", followed in 1999 and resulted in their first music video, for the song "Goodbye Forever". In 2000 Asian Man released the band's second album, "Maybe I'll Catch Fire", as well as the compilation album "Alkaline Trio", collecting most of their previously released early material. Porter then left and was replaced by Mike Felumlee.
Document 7: Glenn Danzig: Glenn Danzig (born Glenn Allen Anzalone, June 23, 1955) is an American singer, songwriter and musician from Lodi, New Jersey. He is the founder of the bands Misfits, Samhain, and Danzig. He owns the Evilive record label as well as Verotik, an adult-oriented comic book publishing company.
Document 8: Dan Johnson (musician): Dan Johnson is an American drummer for Korn guitarist Brian Welch and Love and Death, is the touring percussionist for Red and was the drummer for rock metal band Back from Ashes and hard rock band The Sammus Theory.
Document 9: Dan Andriano: Daniel Michael Andriano (born June 27, 1977) is an American singer, songwriter and musician best known as the co-lead vocalist and bassist of the punk rock band Alkaline Trio, with whom he has recorded eight studio albums.
Document 10: Hurricane Season (album): Hurricane Season is the first studio album by Alkaline Trio vocalist and bassist Dan Andriano, released on August 9, 2011 through Asian Man Records. The album is primarily acoustic, and was met with positive critical reception, being given a 4.5/5 by PunkNews, and a 4/5 by Alternative Press.
Document 11: Alkaline Trio: Alkaline Trio is an American alternative rock band from McHenry, Illinois. The band consists of guitarist and vocalist Matt Skiba, bassist and vocalist Dan Andriano, and drummer Derek Grant. Founded in late 1996 by Skiba, bassist Rob Doran, and drummer Glenn Porter, Alkaline Trio released its debut single, "Sundials", in 1997. Following its release, Doran departed from the band and was replaced by Andriano. The band subsequently recorded an EP, "For Your Lungs Only" (1998), and its debut studio album, "Goddamnit" (1998). Following the release of the band's second album, "Maybe I'll Catch Fire" (2000), Porter left the band and was replaced by Mike Felumlee for its subsequent album, "From Here to Infirmary" (2001).
Document 12: The Best of Skyhooks: The Best of Skyhooks is the second compilation album released in 1979 by Australian band Skyhooks, following "The Skyhooks Tapes" in 1977. The album was released following the departure of lead singer Graeme Strachan in late 1978. The album peaked at number 9 in Australia.
Document 13: Leah Flanagan: Leah Flanagan is a singer-songwriter from Sydney, NSW. Leah has appeared on Australian TV shows Spicks & Specks and RockQuiz, has released 2 albums and toured extensively through Australia with her music and part of festival ensembles. Leah’s status as an Indigenous musician is one of pride and respect; she has helped make history with such recent essential albums as Archie Roach’s 25th anniversary reissue of Charcoal Lane and Buried Country 1.5, The Story of Aboriginal Country Music. Her latest album Saudades was recorded at the studio of Midnight Oil's Jim Moginie and mixed by Paul McKercher (You Am I, Augie March)
Document 14: Peter Allen (musician): Peter Allen (born Peter Richard Woolnough; 10 February 1944 – 18 June 1992) was an Australian-born singer-songwriter, musician and entertainer, known for his flamboyant stage persona and lavish costumes. His songs were made popular by many recording artists, including Elkie Brooks, Melissa Manchester and Olivia Newton-John, with one, "Arthur's Theme" by Christopher Cross, winning an Academy Award for Best Original Song in 1981. In addition to recording many albums, he enjoyed a cabaret and concert career, including appearing at the Radio City Music Hall riding a camel. His Australian patriotism song "I Still Call Australia Home", has been used extensively in advertising campaigns, and was added to the National Film and Sound Archive's Sounds of Australia registry in 2013.
Document 15: Rick Springfield: Richard Lewis Springthorpe (born 23 August 1949) is an Australian singer, instrumentalist, songwriter, actor and author, known by his stage name Rick Springfield. He was a member of the pop rock group Zoot from 1969 to 1971, then started his solo career with his début single "Speak to the Sky" reaching the top 10 in Australia in mid-1972, when he moved to the United States. He had a No. 1 hit with "Jessie's Girl" in 1981 in both Australia and the U.S., for which he received the Grammy Award for Best Male Rock Vocal Performance. He followed with four more top 10 U.S. hits, "I've Done Everything for You", "Don't Talk to Strangers", "Affair of the Heart" and "Love Somebody". Springfield's two U.S. top 10 albums are "Working Class Dog" (1981) and "Success Hasn't Spoiled Me Yet" (1982).
ground_truth: singer, songwriter