Question: Which record producer and engineer worked for the English heavy metal band formed in 1977 in South Yorkshire?
Context: Acrassicauda is an American-based Iraqi heavy metal band formed in 2001.  It is often credited as being the first heavy metal group to emerge from Iraq.  The original band consisted of three Arab members and one Assyrian (Tony Aziz Yaqoo).  The band formed and played concerts under the regime of Saddam Hussein.  It became well known outside of the local Iraqi metal scene after Vice magazine did a profile of the band.  It received even greater coverage when it was profiled in a feature-length documentary about the band and its troubles in Iraq called "Heavy Metal in Baghdad".  The band's first album was released on March 9, 2010. Judas Priest are an English heavy metal band formed in Birmingham, England, in 1969.  The band have sold close to 50 million albums to date.  They are frequently ranked as one of the greatest metal bands of all time.  Despite an innovative and pioneering body of work in the latter half of the 1970s, the band struggled with indifferent record production, repeated changes of drummer and lack of major commercial success or attention until 1980, when they adopted a more simplified sound on the album "British Steel", which helped shoot them to rock superstar status.  In 1989, they were named as defendants in an unsuccessful lawsuit alleging that subliminal messages on the song "Better By You, Better Than Me" had caused the suicide attempts of two young men. Saxon are an English heavy metal band formed in 1977, in South Yorkshire.  As one of the leaders of the new wave of British heavy metal, they had eight UK Top 40 albums in the 1980s including four UK Top 10 albums and two Top 5 albums.  The band also had numerous singles in the UK Singles Chart and chart success all over Europe and Japan, as well as success in the US.  During the 1980s Saxon established themselves as one of Europe's biggest metal acts.  The band tours regularly and have sold more than 15 million albums worldwide.  They are considered one of the classic metal acts and have influenced many bands such as Metallica, Mötley Crüe, Pantera, Sodom. Mac Sabbath is an American parody heavy metal tribute band formed in Los Angeles, California in 2014.  The self-appointed founders of "Drive Thru Metal", the band is primarily a parody of English heavy metal group Black Sabbath, utilizing lyricism and imagery centered on fast food. No Prayer for the Dying is the eighth studio album by English heavy metal band Iron Maiden.  It marks their first line-up change since 1982; guitarist Adrian Smith left the band during the pre-production phase, unhappy with the musical direction it was taking, and only having contributed to one song, "Hooks in You".  Smith was replaced by Janick Gers, who had previously worked with singer Bruce Dickinson on his first solo-album, "Tattooed Millionaire", and had also worked with Ian Gillan, former Marillion singer Fish, and new wave of British heavy metal band, White Spirit. Herman Frank (born 1959) is a German heavy metal guitarist best known for his work with Accept and Victory.  In 2009, he released his first solo album called "Loyal to None".  Frank has also recorded with Hazzard, Sinner, Moon'Doc, Saeko, Thomsen and Poison Sun.  As a record producer and engineer, he has worked for Saxon, Rose Tattoo, Crown of Creation, Molly Hatchet, gutworm, and several others. Diamond Head are an English heavy metal band formed in 1976 in Stourbridge, England.  The band is recognised as one of the leading members of the new wave of British heavy metal movement and is acknowledged by thrash metal bands such as Metallica and Megadeth as an important early influence. Venom are an English heavy metal band formed in 1979 in Newcastle upon Tyne.  Coming to prominence towards the end of the new wave of British heavy metal, Venom's first two albums—"Welcome to Hell" (1981) and "Black Metal" (1982)—are considered a major influence on thrash metal and extreme metal in general.  Venom's second album proved influential enough that its title was used as the name of an extreme metal subgenre: black metal. The Iron Maidens is an American heavy metal band from Los Angeles, California.  Formed in 2001 as an all-female tribute act to English heavy metal band Iron Maiden.  Considered the "World's Only Female Tribute to Iron Maiden," the band currently consists of vocalist Kirsten Rosenberg, bassist Wanda Ortiz, drummer Linda McDonald, guitarist Courtney Cox, and guitarist Nikki Stringfield, Artch is a heavy metal band from Sarpsborg in Norway.  Initially formed in 1983 by guitarist Cato André Olsen and bass player Bernt Jansen, in 1984 guitarist Geir Nilssen, drummer Jørn Jamissen and vocalist Lars Fladeby all joined the band but they had formerly been with a local rock group called Oxygen.  Espen Hoff replaced Mr. Fladeby as lead singer in 1985 but he died in a motorcycle accident later that same year and was replaced by Eiríkur Hauksson in 1986.  Artch released two albums on USA label Metal Blade that got great reviews, especially in the English heavy metal press, but sales were disappointing.  Drummer Jamissen left the band in 1991 and was replaced by Gudmund Bolsgård.  They reformed in 2000 after a prolonged period of inactivity.
Answer: Herman Frank