Question: Are Bobby Tench and Marilyn Manson both songwriters?

full_context: Document 1: Sara Lee Lucas: Prior to joining Marilyn Manson, he drummed for local South Florida bands "333 Lunatic Lane", "Black Janet" and "India Loves You," the latter with future Manson bandmate Scott Putesky aka Daisy Berkowitz.
Document 2: Bobby Gillespie: Robert Bernard Andrew "Bobby" Gillespie (born 22 June 1962) is a Scottish musician and singer-songwriter. He is the lead singer and founding member of the alternative rock band, Primal Scream. He was also the drummer for The Jesus and Mary Chain in the mid-1980s.
Document 3: Bobby Graham (musician): Bobby Graham (11 March 1940 – 14 September 2009) was an English session drummer, composer, arranger and record producer. Shel Talmy, who produced The Kinks, David Bowie and The Who, described Graham as "the greatest drummer the UK has ever produced."
Document 4: Robert Heaton: Robert Charles Heaton (6 July 1961 – 4 November 2004) was the drummer in the English rock band New Model Army. He was born in Knutsford, Cheshire and lived in Canada and Belgium as a child. He was musically gifted, eventually mastering the guitar and harmonica as well as the drums, for which he is better-known, and also played keyboards and fiddle. He was probably the first person to play a synchronous drum and harmonica solo, in 'Shot 18' on the "No Rest for The Wicked" tour. The musical content of "Thunder and Consolation" is essentially his creation. He was the second drummer in NMA but the band's first touring and recording drummer. Having spent several years as back line roadie and tour manager for several other bands, including Hawkwind, he brought professional experience to the band's touring life and was responsible for their hiring of their long-term tour manager 'Tommy T' Walker, a fellow member of the Bradford St George's and Bradford Univ TSA stage crew.
Document 5: Hummingbird (band): Hummingbird were a British rock band, formed in 1974 by Bobby Tench of The Jeff Beck Group and Streetwalkers fame. Hummingbird recorded three successful albums, released by A&M using Ian "Sammy" Samwell as their record producer. The original line up included members of the second Jeff Beck Group, vocalist and guitarist Bobby Tench, keyboardist Max Middleton, bassist Clive Chaman, drummer Conrad Isidore and second guitarist Bernie Holland. At the start of sessions for their first album they were joined by Jeff Beck for a brief period but he did not contribute to the album and left to work on his own project. After the first album Bernie Holland was replaced by guitarist Robert Ahwai and drummer Bernard "Pretty" Purdie replaced Isidore on the next two albums,vocalists Madeline Bell and Liza Strike were brought in to complement the band. They found success mainly in the United States, also in Europe and Japan.
Document 6: Charles Manson: Charles Milles Manson (born Charles Milles Maddox, November 12, 1934) is an American convicted mass murderer and former cult leader who led what became known as the Manson Family, a quasi-commune that arose in California in the late 1960s. Manson's followers committed a series of nine murders at four locations in July and August 1969. In 1971 he was found guilty of first-degree murder and conspiracy to commit murder for the deaths of seven people – most notably of the actress Sharon Tate – all of which were carried out by members of the group at his instruction. Manson also received first-degree murder convictions for two other deaths. Manson was originally sentenced to death, but his sentence was commuted to life imprisonment when California invalidated the state's death penalty statute in 1972. He is currently serving multiple life sentences at California State Prison in Corcoran.
Document 7: Bobby Tench: Robert Tench also known as Bobby Tench, is a British vocalist, guitarist, sideman, songwriter and arranger. He is credited on recordings as Bob Tench and Bobby Gass.
Document 8: List of Marilyn Manson band members: Throughout the band's history, Marilyn Manson has only had one consistent member, being Marilyn Manson himself. This is a timeline of all of the band members since their formation in 1989. Most, if not all, members of the band have contributed performances (either live or in-studio) on instruments other than their primary ones. For instance, Gacy has played theremin and calliope, Manson has played pan flute, harpsichord, keyboards, and guitar, and Berkowitz has been credited with bass guitar and drum machines. Keyboardists Madonna Wayne Gacy and Chris Vrenna have also performed additional percussion on-stage, and current touring keyboardist Spencer Rollins plays additional guitar live. Further details on these contributions can be found in the individual members' articles, and in the articles on the band's albums.
Document 9: Tim Ten Yen: Tim Ten Yen, also known as "TTY", is an English recording artist. He has been called the "Sensational Singing Salaryman". and championed by influential English disc jockey Steve Lamacq as a "cult figure of the future".
Document 10: Hummingbird discography: This page lists the albums recorded by the rock band Hummingbird, which was formed by Bobby Tench and included other former members of The Jeff Beck Group. All three albums were produced by Ian Samwell.
Document 11: Marilyn Manson (band): Marilyn Manson is an American rock band formed by singer Marilyn Manson and guitarist Daisy Berkowitz in Fort Lauderdale, Florida, in 1989. Originally named Marilyn Manson & the Spooky Kids, they gained a local cult following in South Florida in the early 1990s with their theatrical live performances. In 1993, they were the first act signed to Trent Reznor's Nothing Records label. Until 1996, the name of each member was created by combining the first name of an iconic female sex symbol and the last name of an iconic serial killer, for example Marilyn Monroe and Charles Manson. Their lineup has changed between many of their album releases; the current members of Marilyn Manson are the eponymous lead singer (the only remaining original member), bassist Twiggy Ramirez, guitarists Paul Wiley and Tyler Bates, and drummer Gil Sharone.
Document 12: Marilyn Manson: Brian Hugh Warner (born January 5, 1969), known professionally as Marilyn Manson, is an American singer, songwriter, musician, composer, actor, painter, author and former music journalist. He is known for his controversial stage personality and image as the lead singer of the band Marilyn Manson, which he co-founded with guitarist Daisy Berkowitz and of which he remains the only constant member. His stage name was formed by combining and juxtaposing the names of two American pop cultural icons: actress Marilyn Monroe and cult leader Charles Manson.
Document 13: The Manson Family Album: The Manson Family Album is the first studio recording by American rock band Marilyn Manson. It is a precursor to the band's debut studio album, 1994's "Portrait of an American Family". It was produced by Roli Mosimann, and is composed of original takes and mixes of songs which would later be found on their debut. However, the band's eponymous vocalist was unhappy with Mosimann's production, claiming it was too "smoothed and polished", and poorly representative of the band's established sound. The majority of songs on "The Manson Family Album" were later re-recorded or remixed with Nine Inch Nails frontman Trent Reznor at the Record Plant in Los Angeles. The album's title is a double entendre; it also relates to the commune of cult leader Charles Manson.
Document 14: Scott Putesky: Scott Mitchell Putesky (born April 28, 1968), more famously known as Daisy Berkowitz, is an American musician, and was the lead guitarist and co-founder of the industrial metal band Marilyn Manson. He left the band on May 8, 1996, halfway through the recording of "Antichrist Superstar".
Document 15: Lunch Boxes &amp; Choklit Cows: Lunch Boxes & Choklit Cows is a compilation album of previously unreleased demo tracks recorded in the early 1990s by Marilyn Manson (then known as Marilyn Manson & The Spooky Kids). Original guitarist Scott Putesky ("Daisy Berkowitz") obtained the rights to these and 11 other recordings in a lawsuit against Brian Warner ("Marilyn Manson"), and has announced that this release is only the first in a planned series of Spooky Kids CDs. Some are from demos and others have never been previously released. These are digitally remastered and Putesky says they sound better than the original cassettes because of it.
ground_truth: yes