Question: Derek St. Holmes and Angela Gossow, have what occupation in common?

full_context: Document 1: Stranglehold (Ted Nugent song): "Stranglehold" is a single and the first track from Ted Nugent's self-titled 1975 album. The vocals are performed not by Nugent, but by Derek St. Holmes. However, the "Sometimes you wanna get higher" verse is sung by Ted himself. In Martin Popoff's book, "Epic Ted Nugent", Nugent admits that the song "Stranglehold" was co-written by Rob Grange, yet he never received a share for co-writer. "Stranglehold" would set the stage for Nugent's career, a guitar-driven track over eight minutes long - its famous guitar solo having been recorded in a single take.
Document 2: Chris Holmes (musician): Christopher John Holmes, born June 23, 1958 in Glendale, California, is a heavy metal guitarist and songwriter who grew up in La Canada, California. Holmes started his musical career in the Pasadena, California area in the late 1970s and early 1980s. He is best known as the lead guitarist of heavy-metal band W.A.S.P. Together with Blackie Lawless and Randy Piper, he was one of the founding members of the band. Holmes was a member of W.A.S.P. first from 1982 to 1990, and again from 1996 to 2002.
Document 3: Arch Enemy discography: The following is a comprehensive discography of Arch Enemy, a Swedish melodic death metal band that formed in 1996. Its members were in bands such as Carcass, Armageddon, Carnage, Mercyful Fate, Spiritual Beggars, and Eucharist. It was founded by Carcass guitarist Michael Amott along with Johan Liiva, who were both originally from the influential death metal band Carnage. The band has released ten studio albums, three live albums, three video albums and three EPs. The band was originally fronted by Johan Liiva, who was replaced by German Angela Gossow as lead vocalist in 2000. Gossow left the band in March 2014 and was replaced by Canadian Alissa White-Gluz, while remaining as the group's manager.
Document 4: War Eternal: War Eternal is the ninth studio album by Swedish melodic death metal band Arch Enemy, which was released on June 9, 2014 by Century Media. It is the first Arch Enemy album in 13 years since Wages of Sin to feature a new line-up; Alissa White-Gluz took over on vocals after former long-time vocalist Angela Gossow stepped down from vocal duties to be the band's business manager. Additionally, ex-Arsis guitarist Nick Cordle replaced Christopher Amott in 2012. Cordle ultimately left the band just before their European tour and was replaced by former Nevermore Guitarist Jeff Loomis
Document 5: Nell Sigland: Ragnhild Westgaard Sigland (born November 13, 1976), mostly known by her stage name Nell Sigland, is a Norwegian singer from Hamar, best known as the lead vocalist of Norwegian gothic metal band Theatre of Tragedy as a replacement for Liv Kristine, from June 3, 2004 to October 2, 2010. She was also the lead singer for Norwegian gothic rock band The Crest, founded by her husband Kristian Sigland and herself.
Document 6: Angela Gossow: Angela Nathalie Gossow (born 5 November 1974) is a German vocalist, best known as the former lead vocalist for the Swedish melodic death metal band Arch Enemy. Her other previous bands include Asmodina and Mistress. She is considered to be one of the few successful female metal singers to use growling as her primary singing style.
Document 7: Whitford/St. Holmes: Whitford/St. Holmes is the self-titled debut of then ex-Aerosmith guitarist Brad Whitford and then ex-Ted Nugent vocalist Derek St. Holmes, released in 1981.
Document 8: Alissa White-Gluz: Alissa White-Gluz ( ; born July 31, 1985) is a Canadian vocalist, best known as lead vocalist of the Swedish melodic death metal band Arch Enemy, and former lead vocalist and founding member of the Canadian metal band The Agonist.
Document 9: Ted Nugent: Theodore Anthony Nugent ( ; born December 13, 1948) is an American singer-songwriter, musician and activist. Nugent initially gained fame as the lead guitarist of the Amboy Dukes, a band formed in 1963 that played psychedelic rock and hard rock. After playing with the Amboy Dukes, he embarked on a solo career.
Document 10: Cat Scratch Fever: Cat Scratch Fever is the third studio album by American guitarist and singer-songwriter Ted Nugent and his band, as well as the name of the album's title song. Vocalist Derek St. Holmes, who had left the band during the recording of the album "Free-for-All", had come back for touring in 1976 and was again the lead singer on this album.
Document 11: Anette Olzon: Anette Ingegerd Olsson (born 21 June 1971), known by the stage name Anette Olzon, is a Swedish singer, best known as the lead vocalist of Finnish symphonic metal band Nightwish from 2007 to 2012. She is also the former vocalist of Swedish classic rock band Alyson Avenue.
Document 12: Hey Baby (Ted Nugent song): "Hey Baby" is a rock single by the guitarist, vocalist and songwriter Ted Nugent from his first solo album, "Ted Nugent". It was the only song in the whole album that Derek St. Holmes wrote and arranged himself.
Document 13: Derek St. Holmes: Derek St. Holmes (born February 24, 1953) is an American musician, best known as the vocalist and rhythm guitar player for Ted Nugent's early solo career.
Document 14: Arch Enemy: Arch Enemy is a Swedish melodic death metal band, originally a supergroup, from Halmstad, formed in 1996. Its members were in bands such as Carcass, Armageddon, Carnage, Mercyful Fate, Spiritual Beggars, Nevermore, and Eucharist. It was founded by Carcass guitarist Michael Amott along with Johan Liiva, who were both originally from the influential death metal band Carnage. The band has released ten studio albums, three live albums, three video albums and four EPs. The band was originally fronted by Johan Liiva, who was replaced by German Angela Gossow as lead vocalist in 2000. Gossow left the band in March 2014 and was replaced by Canadian Alissa White-Gluz, while remaining as the group's manager.
Document 15: Thomas Gabriel Fischer: Thomas Gabriel Fischer (born 19 July 1963), also known by his stage names of Tom G. Warrior and Satanic Slaughter, is a Swiss metal musician. He is considered to be one of the pioneers of the death metal style of singing, which resembles guttural growling. He led the groups Hellhammer and Celtic Frost, and today is the frontman of the band Triptykon.
ground_truth: vocalist