Question: What type of profession does Sting and Marian Gold and have in common?

full_context: Document 1: Herwig Mitteregger: Herwig Rudolf Mitteregger (born 1953) is an Austrian musician. He became known with the Nina Hagen Band. He lives in Hamburg, Germany. He was also a member of German rock band Spliff. After two albums with Nina Hagen, he founded with his mates from the Nina Hagen Band (Bernhard Potschka (Guitar), Manfred Praeker (Bass), Reinhold Heil (Keyboards), Spliff). After four records the band split up. Mitteregger released five solo albums until he moved to Spain and became a father. 2008 he returned to Germany and released "Insolito".
Document 2: Suggs (singer): Graham McPherson (born 13 January 1961), known by the stage name Suggs, is an English singer-songwriter, musician, radio personality and actor.
Document 3: Alphaville (band): Alphaville is a German synthpop/new wave band which gained popularity in the 1980s. The founding members were lead singer Marian Gold (real name: Hartwig Schierbaum, born 26 May 1954 in Herford), Bernhard Lloyd (real name: Bernhard Gössling, born 2 June 1960 in Enger), and Frank Mertens (real name: Frank Sorgatz, born 26 October 1961 in Enger). The band was at first named "Forever Young" before being changed to "Alphaville". They achieved chart success with the singles "Big in Japan", "Sounds Like a Melody", "Jet Set", "Dance With Me", "Jerusalem", "Romeos" and "Forever Young".
Document 4: Markus Haider: Markus Haider is an Austrian singer part of The Gang Guys, who dub themselves "the Austrian Rat Pack", a tribute band to the original Rat Pack. He is most famous for a popular performance of Dean Martin's Sway that is commonly but mistakenly thought to be performed by Frank Sinatra.
Document 5: Marian Gold: Hartwig Schierbaum (born 26 May 1954), better known by his stage name Marian Gold, is the lead singer of the German synthpop group Alphaville, and has also recorded as a solo artist.
Document 6: Stewart Copeland: Stewart Armstrong Copeland (born July 16, 1952) is an American musician and composer, best known as the former drummer for the English rock band the Police, and for his film and video game soundtracks. Copeland has also written various pieces of music for ballet, opera and orchestra. According to MusicRadar, Copeland’s "distinctive drum sound and uniqueness of style has made him one of the most popular drummers to ever get behind a drumset". He was inducted into the Rock and Roll Hall of Fame as a member of the Police in 2003, the "Modern Drummer" Hall of Fame in 2005, and the "Classic Drummer" Hall of Fame in 2013. In 2016, Copeland was ranked 10th on "Rolling Stone"' s "100 Greatest Drummers of All Time".
Document 7: 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 8: So Long Celeste (album): So Long Celeste is the debut solo album by German singer Marian Gold. It was released in 1992.
Document 9: United (Marian Gold album): United is the Second solo album by German singer Marian Gold. It was released in 1996.
Document 10: Paul McCartney: Sir James Paul McCartney, {'1': ", '2': ", '3': ", '4': "} (born 18 June 1942) is an English singer-songwriter, multi-instrumentalist, and composer. He gained worldwide fame as the bass guitarist and singer for the rock band the Beatles, widely considered the most popular and influential group in the history of pop music. His songwriting partnership with John Lennon is the most celebrated of the post-war era. After the group disbanded in 1970, he pursued a solo career and formed the band Wings with his first wife, Linda, and Denny Laine.
Document 11: Joe Strummer: John Graham Mellor (21 August 1952 – 22 December 2002), known by his stage name Joe Strummer, was an English musician, singer, actor and songwriter who was the co-founder, lyricist, rhythm guitarist and lead vocalist of the Clash, a punk rock band formed in 1976 as part of the original wave of British punk.
Document 12: Marc Almond: Peter Mark Sinclair "Marc" Almond (born 9 July 1957) is an English singer-songwriter and musician. Almond first began performing and recording in the synthpop/new wave duo Soft Cell. He has also had a diverse career as a solo artist. His collaborations include a duet with Gene Pitney on the 1989 UK number one single "Something's Gotten Hold of My Heart". Almond has sold over 30 million records worldwide.
Document 13: Michael Stipe: John Michael Stipe (born January 4, 1960) is an American singer, songwriter, musician, film producer, music video director, visual artist, and philanthropist. He is best known as the lead singer of the alternative rock band R.E.M. from their formation in 1980 until their dissolution in 2011.
Document 14: Sting (musician): Gordon Matthew Thomas Sumner, {'1': ", '2': ", '3': ", '4': "} (born 2 October 1951), better known by his stage name Sting, is an English musician, singer, songwriter and actor. He was the principal songwriter, lead singer, and bassist for the new wave rock band The Police from 1977 to 1984, before launching a solo career.
Document 15: Alison Goldfrapp: Alison Elizabeth Margaret Goldfrapp (born 13 May 1966) is an English musician and record producer, best known as the lead vocalist of the electronic music duo Goldfrapp.
ground_truth: singer