Question: Both Brian Warren and Jake Shields are considered what?

Context paragraphs:
Manbox: Manbox is the collaborative efforts of both Christopher Browder of Mansions and Brian Warren of Weatherbox.  The EP was recorded over the internet between the two musicians.  There were 200 hand-painted CD-R copies made of the release.  Manbox was released through Doghouse Records.

List of songs recorded by My Bloody Valentine: My Bloody Valentine, an alternative rock band from Dublin, Ireland, have recorded songs for three studio albums and a number of extended plays, singles and compilation releases.  Formed in 1983 by Kevin Shields, Colm Ó Cíosóig and David Conway, the band had a series of unsuccessful releases throughout the mid-1980s on various independent record labels.  In 1987, after the addition of bassist Debbie Googe and vocalist-guitarist Bilinda Butcher, My Bloody Valentine released "Strawberry Wine", "Ecstasy", and the 1988 EP "You Made Me Realise", which were predecessors to the band's debut album "Isn't Anything" (1988).  Considered an independent success, the band released two further EPs before "Loveless" (1991), their second studio album; which is considered their "magnum opus" and which received unanimous critical acclaim since its release.  Both albums pioneered an alternative rock subgenre known as shoegazing, a term coined by "Sounds" journalists to describe certain bands' "motionless performing style, where they stood on stage and stared at the floor".  My Bloody Valentine disbanded in 1997 after failing to utilise a third album although Kevin Shields was rumoured to have sent 60 hours worth of material to Island Records, with whom the band signed after being dropped by Creation Records in 1991.  My Bloody Valentine reunited in 2007 and began completing their third album.  The album, "m b v", was self-released in 2013 and received "universal acclaim", according to Metacritic.

Fight Life: Fight Life is a feature-length documentary on the sport of mixed martial arts.  The film is directed by independent filmmaker James Z. Feng and produced by RiLL Films.  The film focuses on the lives of professional mixed martial arts fighters outside the cage, primarily profiling Jake Shields, and Lyle Beerbohm.  The film unveils the sport of Mixed martial arts and what it takes to be a modern-day professional fighter.  Many notables MMA stars and experts are featured in this film, including: Nick Diaz, Gilbert Melendez, Chuck Liddell, Frank Shamrock, Miesha Tate, John McCarthy, Julianna Pena, Michael Chiesa, Herschel Walker, Sam Sheridan, Mark Coleman, Tyron Woodley, Ryan Schultz, Matt Lindland, Mike Swick, and Cody McKenzie.  In 2013, "Fight Life" went on to win the Best Documentary Award at the United Film Festival.

Jake Shields: Jake Sequoyah Shields (born January 9, 1979) is an American mixed martial artist, currently fighting in the welterweight division for the World Series of Fighting.  He was the last Rumble on the Rock Welterweight Champion, the only Elite XC Welterweight Champion, a former Shooto Welterweight Champion and former Strikeforce Middleweight Champion.  He also fought for the Ultimate Fighting Championship (UFC).

Weatherbox: Weatherbox was an indie rock rock band from San Diego, California, led by singer/songwriter Brian Warren and currently composed of Warren and varied touring members.

Brian Warren: Brian Warren (born June 5, 1974) is an American mixed martial arts fighter from San Bernardino, California.  Warren has fought in many organizations including K-1, King of the Cage, Strikeforce, Kage Kombat, Pangea, and Bellator.  Warren has fought notable title holders such as Cung Le, Jason "Mayhem" Miller, Jeremy Horn, Jake Shields, and other known fighters such as TUF alum Jared Rollins, Justin Levens, Nate Loughran, Karo Parisyan, and Tiki Ghosn.  Warren won a 2nd place medal in 2003 and 3rd place medal in 2006 in the advanced men's division of Grapplers Quest.

Shields Warren: Shields Warren (26 February 1898 – 1 July 1980) was an American pathologist.  He was among the first to study the pathology of radioactive fallout.  Warren influenced and mentored Eleanor Josephine Macdonald, epidemiologist and cancer researcher.

City Girl (song): "City Girl" is a song by the Irish alternative rock musician Kevin Shields.  It is the second track from the soundtrack to the 2003 film "Lost in Translation" and was released as a standalone single in June 2003.  Recorded during summer 2002 with "Lost in Translation"' s music co-ordinator Brian Reitzell, "City Girl" was among the first original material released by Shields since My Bloody Valentine's second studio album, "Loveless" (1991)—on which he was the main composer, musician and producer.

Ju-Taun: JUTAUN (pronounced zha-táwn) is a genre-defying band that began as a multi-cultural R&B male vocal group of high school friends from Monroe Township, Gloucester County, New Jersey.  Brothers Jake and James Evans teamed with Anthony "Brian" Lewis, Peter Garcia, and Samoeun Cheng in the Spring of 1999.  The father of Jake and James Evans, Jake Evans Jr., served as the group's vocal coach and mentor.  He incorporated their sound with influences of classic R&B acts like The Temptations, Take 6, and Earth, Wind & Fire.  As the band grew, Jake, James, and Samoeun recruited current members Stephen Honsberger and Carter Fox.

Frank Gomez: Frank Gomez (born March 31, 1986) is an American mixed martial artist.  He formally fought in the WEC's bantamweight division.  Gomez is from Albuquerque, New Mexico where he trains full-time with Jackson's Submission Fighting.  He got into MMA from wrestling at San Francisco State College where he met up with Gilbert Melendez and Jake Shields.

Supporting paragraphs: Brian Warren Jake Shields
Answer: mixed martial arts fighter