Question: Derrick Green and Pete Stewart are both what?

Context paragraphs:
Outface: Outface was a punk rock/hardcore band formed in the Cleveland, Ohio area in the mid 1980s, by Chris Hall and Charlie Garriga fronted, eventually by future Sepultura singer Derrick Green.  The band also featured bassist Frank Cavanagh of Filter and guitarist Charlie Garriga of CIV, who was self-taught.  Mark Konopka was the drummer.  They recorded one demo tape in 1987, and later reunited for a studio album, Friendly Green, released 1992.  Stylistically, their music varies between rock, metal and punk with ska elements, not unlike the early works of Red Hot Chili Peppers.  Green was credited as Simon Verde on the Outface release.

Raimundos: Raimundos is a Brazilian punk/hardcore band.  They have major influences of 1980s punk bands, especially Ramones.  The band was formed in Brasilia, in 1987 by Digão and Rodolfo Abrantes.  The vocalist Derrick Green of Sepultura participated on their CD "Kavookavala" and João Gordo of Ratos de Porão participated on their first album "Raimundos" (1994) providing backing vocals on the song "MM's".  The name of the band refers to one of its biggest influences, Ramones, being also one of the most common male first names in Brazilian northeast region.

Live in São Paulo (Sepultura album): Live In São Paulo is the second live album by Brazilian heavy metal band Sepultura.  All the tracks were recorded on April 3, 2005, at a concert in São Paulo, Brazil.  A DVD was also filmed at the show.  The performance of "Refuse/Resist" was released as the single for the album.  Both were released on November 8, through SPV Records.  The album and DVD are the second time that fans can hear singer Derrick Green perform Max Cavalera-era Sepultura songs on an official release.  A live version of "Roots Bloody Roots" featuring Green was released as a bonus track on "Nation".

Choke (song): "Choke" is Sepultura's tenth official single, and the first of three to be taken from the album "Against", released in 1998.  This is the band's first single with Derrick Green on vocals.  It is still played in concerts.  The video for the single was filmed at Green's first concert with the band, and can be found on the DVD "Live In São Paulo".  The cover artwork simply shows the four member of the band during the same performance.

Blood-Rooted: Blood-Rooted is an album by Sepultura, released on June 3, 1997.  It was a collection of unreleased tracks, b-sides, remixes, and live recordings.  It was also the last officially recognised Sepultura album featuring original singer Max Cavalera, who left in December 1996 amid a dispute regarding the band's management.  Cavalera was replaced by American singer Derrick Green in 1997.

Against (album): Against is the seventh studio album by the Brazilian metal band Sepultura, released in 1998 through Roadrunner Records.  It is the band's first release with new frontman Derrick Green, who replaced group founder Max Cavalera in 1997.

Derrick Green: Derrick Leon Green (born January 20, 1971) is an American musician, best known as the singer of Brazilian heavy metal band Sepultura.  He joined the band in 1997 after the departure of group founder Max Cavalera.

Friendly Green: Friendly Green is the only album released by the alternative metal group Outface, most famous for being Sepultura vocalist Derrick Green's first published recording.

Pete Stewart: Pete Stewart is a singer, guitarist, songwriter and producer from Seattle, Washington.  He is the lead singer and guitarist of Grammatrain, was the lead singer for The Accident Experiment, and is the former guitarist of Tait.

Renée Green: Renée Green (born 1959) is an American artist, writer, and filmmaker.  Her pluralistic practice spans a broad range of media including sculpture, architecture, photography, prints, video, film, websites, and sound, which normally converge in highly layered and complex installations.  Green studied art at Wesleyan University, with an intermediary year at the School of Visual Arts in New York.  Green also attended the Radcliffe Publishing Procedures Course, at Harvard University, Cambridge, MA.  In 1989 she was a participant in the Whitney Museum of American Art Independent Study Program (ISP).  She is the sister of Derrick Green, frontman of the metal band Sepultura.

Supporting paragraphs: Derrick Green Pete Stewart
Answer: singer