Question: Who was the bassist for Tool's song "Schism"?

Context paragraphs:
Opiate (EP): Opiate is an EP by American rock band Tool.  It was produced and engineered by Sylvia Massy and former Minor Threat bassist Steve Hansgen.  Released in 1992, it was the result of some two years of the band playing together after their formation in 1990.  "Opiate" preceded Tool's first full-length release, "Undertow", by a year.  It is named after a quote by Karl Marx: "Religion [...] is the opium of the masses".  As of July 7, 2010, "Opiate" has sold 1,155,000 copies in the US and is certified Platinum by the RIAA.

Hooker with a Penis: "Hooker with a Penis" is a song by the American rock band Tool.  It was released on September 17, 1996, as the seventh track off their second studio album, "Ænima".  The song is one of the heaviest tracks from the album, and perhaps one of the heaviest songs by Tool.  Unlike the more progressive sound found on the rest of the album, the track has elements of hardcore punk and thrash metal especially toward the end with some of Danny Carey's fastest double bass drumming.

Hush (Tool song): "Hush" is a song by Tool from their 1992 debut EP "Opiate", recorded by producer Sylvia Massy at Sound City Studios.  It was the only single released from "Opiate" and was the first song that helped establish the band's reputation.  The lyrics protest Tipper Gore and censorship, which is a recurring theme in Tool songs.

Parabola (song): "Parabola" is a song by the American rock band Tool, the song was released as the second single from their third studio album "Lateralus".  It was released in 2002 as a promo only, however, on December 20, 2005, the single was re-released, which includes the song and a DVD containing the music video and an optional "dual" audio commentary on the video by Jello Biafra of Dead Kennedys fame.  The dual commentary consists of two separate recordings of Biafra's voice, one playing in each stereo channel.  The DVD was released alongside a DVD single for "Schism" as well.

Asia Featuring John Payne: Asia Featuring John Payne are a rock group formed in 2007 following a schism in the line-up of Asia.  The band are a continuation of singer and bassist John Payne's career as the band's frontman, which lasted from 1991 until 2006, when Asia's original 1982 lineup reunited.

Dull Tool: "Dull Tool" is a song by American singer-songwriter Fiona Apple, released on the soundtrack to the comedy film "This Is 40" (2012).  It is the first track Apple wrote solely for a film.  "Dull Tool" was produced by Apple's long-time collaborator Jon Brion, and leaked online in November 2012, several weeks before the soundtrack hit stores on December 11.  Apple recorded a second song for "This Is 40", though this was not included in the film nor its soundtrack.

Schism (song): "Schism" is a song by American rock band Tool.  It was the first single and music video from their third full-length album, "Lateralus".  In 2002, Tool won the Grammy Award for Best Metal Performance for the song.  "Schism" was released as a DVD single on December 20, 2005.  The DVD contains the music video, dual-commentary by David Yow, and a remix by Lustmord.

12th century: As a means of recording the passage of time, the 12th century is the period from 1101 to 1200 in accordance with the Julian calendar in the Common Era.  In the history of European culture, this period is considered part of the High Middle Ages and is sometimes called the Age of the Cistercians.  In Song dynasty China an invasion by Jurchens caused a political schism of north and south.  The Khmer Empire of Cambodia flourished during this century, while the Fatimids of Egypt were overtaken by the Ayyubid dynasty.

Tool (band): Tool is an American rock band from Los Angeles, California.  Formed in 1990, the group's line-up includes drummer Danny Carey, guitarist Adam Jones, and vocalist Maynard James Keenan.  Justin Chancellor has been the band's bassist since 1995, replacing their original bassist Paul D'Amour.  Tool has won three Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries.

Carmen de synodo ticinensi: The Carmen de synodo ticinensi ("Song of the Synod of Ticinum") is a poem of nineteen stanzas of five lines each in iambic trimeter.  Shortly after the Synod of Pavia (Ticinum) in 698, the "Carmen" was written down in a cursive hand on some blank pages in a copy of the acts of the Council of Chalcedon.  The same hand also added it to another manuscript.  It records that the assembled churchmen made heavy use of ancient texts, perhaps including the manuscript in which it was later written.  It is the principal contemporary source of the synod, which brought to an end the Schism of the Three Chapters in Italy.

Supporting paragraphs: Schism (song) Tool (band)
Answer: Justin Chancellor