Question: After attending Berklee College of Music in Boston, who helped to produce the second album by Vertical Horizon?
Context: The Berklee Performance Center is a 1,215-seat theatre located on Massachusetts Ave. in the Back Bay area of Boston, Massachusetts.  It is the largest theatre space on the Berklee College of Music campus and is used primarily for college-affiliated activities.  Presenters from outside the Berklee community also rent it for performances of all kinds.  In 2009, the Berklee Performance Center hosted a total of 200 events. "Everything You Want" is a song by American alternative rock band Vertical Horizon and the eponymous second single from their third studio album "Everything You Want".  Released on April 4, 2000.  The single reached the top of the "Billboard" Hot 100 after a 26-week climb on July 15 of that year.  "Everything You Want" is Vertical Horizon's most successful single. Matt Hyde (born June 19, 1964) is an American producer, engineer, mixer and musician.  From 1982 to 1985 he attended Berklee College of Music in Boston.  While still at Berklee (1984) he obtained an internship at Pyramid Recording Studio in Boston.  After two semesters at Berklee, Hyde took a break from classes to tour for the Department of Defense overseas entertainment program, playing guitar and keyboards in several top 40 cover bands that played shows at U.S. military bases in foreign countries throughout Europe and the Pacific.  When he returned to the U.S., he began working at recording studios, first in Boston and from 1989 in Los Angeles. Holiday Mountain is an electronic music duo founded in 2011 by Mexican-American songwriter and keyboardist Laura Patiño with drummer and producer Zander Kagle.  The two met in Boston while attending Berklee College of Music in 2011.  The trio is inspired by music groups like Santigold, Major Lazer, and Die Antwoord.  The duo combines edm, hip hop, reggae, dubstep, and Cumbia to create a heavy futuristic dance genre.  Patiño’s vocal stylings & fashion sense is influenced by Billie Holiday, M.I.A., Amy Winehouse, and Gwen Stefani.  The name Holiday Mountain is a combination of Billie Holiday and the Rocky Mountains, two large inspirations for Laura Patiño. Berklee College of Music, located in Boston, Massachusetts, United States, is the largest independent college of contemporary music in the world.  Known for the study of jazz and modern American music, it also offers college-level courses in a wide range of contemporary and historic styles, including rock, flamenco, hip hop, reggae, salsa, and bluegrass.  Since 2012, Berklee College of Music has also operated a campus in Valencia, Spain. Running on Ice is the second album by Vertical Horizon, released independently in 1995, and later re-released by RCA.  It was produced by John Alagia (John Mayer, Dave Matthews Band), Doug Derryberry and Matt Scannell.  Though still technically a duo and acoustic based, "Running On Ice" featured many guest musicians (most notably Carter Beauford of the Dave Matthews Band on drums), giving the album more of a full band sound.  Derryberry also contributed keyboards and vocals. John Clayton Mayer ( ; born October 16, 1977) is an American singer-songwriter, guitarist, and producer.  He was born in Bridgeport, Connecticut, and raised in nearby Fairfield.  He attended Berklee College of Music in Boston, but disenrolled and moved to Atlanta in 1997 with Clay Cook.  Together, they formed a short-lived two-man band called Lo-Fi Masters.  After their split, Mayer continued to play local clubs—refining his skills and gaining a following.  After his appearance at the 2001 South by Southwest Festival, he was signed to Aware Records, and then Columbia Records, which released his first EP, "Inside Wants Out".  His following two full-length albums—"Room for Squares" (2001) and "Heavier Things" (2003)—did well commercially, achieving multi-platinum status.  In 2003, he won the Grammy Award for Best Male Pop Vocal Performance for the single "Your Body Is a Wonderland". The discography of Dream Theater, an American progressive metal/rock band, consists of thirteen studio albums, one extended play, eight live albums, one compilation album, eight video albums, twenty-seven singles, and eleven music videos.  The band was formed under the name Majesty by guitarist John Petrucci, bassist John Myung, and drummer Mike Portnoy while the three of them were attending Berklee College of Music in September 1985.  The trio added keyboard player Kevin Moore and vocalist Chris Collins in order to complete their lineup.  After the band released a demo entitled "Majesty Demos", Collins was replaced by Charlie Dominici in November 1987. wiidope is a production group of three musicians, composers and engineers that assembled in 2009 while attending Berklee College of Music for postgraduate studies.  Members are Carl Seanté (McGrier II), Kofi Owusu-Ofori & Kyuwon "Q" Kim.  Their most notable works include YouTube/MTV personality Todrick Hall, singer/actress Jadagrace, Korean Boy-band SHINee, American Idol finalist Vonzell Solomon and their work on the Grammy Award Winning Album "The Mosaic Project" with jazz drummer, composer and vocalist Terri Lyne Carrington. Live Stages is a live album by Vertical Horizon, released by Rhythmic Records in early 1997, and later re-released by RCA Records.  This album was recorded live at Ziggy's in Winston-Salem, North Carolina.  It featured mostly songs from the band's second album, Running on Ice, (and "On the Sea" from "There and Back Again"), as well as new material.  This was the first Vertical Horizon album to feature Scannell more prominently on electric guitar, and also the first to include drummer Ed Toth.  Ryan Fisher played bass.
Answer: John Mayer