Question: Are Bobby Tench and Marilyn Manson both songwriters?

Context paragraphs:
The Beautiful People (song): "The Beautiful People" is a song by American rock band Marilyn Manson.  It was released as the lead single from the band's second studio album, "Antichrist Superstar" in September 1996.  Classified as alternative metal, the song was written by frontman Marilyn Manson and Twiggy Ramirez, and was produced by Trent Reznor, Dave Ogilvie and Manson.  Lyrically, it discusses what Manson refers to as "the culture of beauty".

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.

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.

My Girlfriend (Relient K song): "My Girlfriend" is a song by the Christian rock band Relient K, released on their self-titled first album.  The song originally appeared as "Marilyn Manson Ate My Girlfriend" on the band's demo album, "All Work and No Play".  The song is about Marilyn Manson eating Matt Thiessen's girlfriend.  Thiessen wrote this song when he was 15 years old.  Thiessen has said that he wrote it because of a female friend, who lived eight hours away in Pennsylvania, who he would talk to about many things including spiritual matters such as where God was taking them in the future.  His friend would later turn from Christian music to Nine Inch Nails and Marilyn Manson.  In an interview with CCM Magazine Thiessen stated "through this she changed her lifestyle [and] what she believed in."  His friend would later be expelled from school and would be kicked out of her house and sent to a youth detention center.  Thiessen would later state "She felt that Christianity was stupid and just this big hypocrisy.  Being young and impressionable, I just wrote this little, stupid song, but that was the way I dealt with it—writing this song about how she got so consumed by Marilyn Manson."

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.

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.

Twiggy Ramirez: Jeordie Osbourne White (born June 20, 1971), once known professionally as Twiggy Ramirez, shortened to just Twiggy since returning to Marilyn Manson, and sometimes referred to by his real name, is an American musician, mostly known as the bassist and guitarist of the band Marilyn Manson.  Previously, he was the bassist for A Perfect Circle and a touring member of Nine Inch Nails, and is currently the vocalist for Goon Moon.  He left Marilyn Manson in 2002, and later rejoined the band in 2008.  He has been a principal songwriter for the band and has also contributed to some of the Desert Sessions recordings.  He also currently hosts the Hour Of Goon podcast with fellow musician Fred Sablan, on the Feral Audio network.

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.

If I Was Your Vampire: "If I Was Your Vampire" is a song by Marilyn Manson, and is the first track on the album "Eat Me, Drink Me".  Marilyn Manson wrote the song on Christmas Day in 2006.  The song was uploaded to Manson's MySpace on April 16, 2007 and was officially released on June 5, 2007 on the album.

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.

Supporting paragraphs: Bobby Tench Marilyn Manson
Answer: yes