Question: What year was the band formed by Steven Wilson and worked on by Paul Northfield founded?

Context paragraphs:
Aziz Ibrahim: Aziz-Ur-Rahman Ibrahim (born March 1964) is a British musician.  He was born in Longsight, Manchester to Pakistani parents.  He is best known for his work as guitarist with Simply Red, The Stone Roses (post-John Squire) and their former vocalist Ian Brown in whose band he regularly performs – both in the studio and live.  He is also a member of the H Band with Marillion's lead singer Steve Hogarth and is involved in the writing of the second H Band album.  He has also worked with Paul Weller, Steven Wilson, Asia and contributed to The Players' debut album "Clear the Decks".

Black Clouds &amp; Silver Linings: Black Clouds & Silver Linings is the tenth studio album by American progressive metal/rock band Dream Theater, released on June 23, 2009 through Roadrunner Records.  It is the band's last album to feature drummer and founding member Mike Portnoy before his departure on September 8, 2010.  The album was recorded between October 2008 and March 2009 at Avatar Studios in New York City.  It was produced by John Petrucci and Portnoy, and was engineered and mixed by Paul Northfield.

Vapor Trails: Vapor Trails is the seventeenth studio album by Canadian rock band Rush, produced by Paul Northfield and released in May 2002.  Its release marked the first studio album for the band since "Test for Echo" in 1996 (the longest gap between Rush albums to date) because of personal tragedies that befell drummer Neil Peart in the late 1990s.  According to the band, the entire developmental process for "Vapor Trails" was extremely taxing and took about 14 months to finish, the longest the band had ever spent writing and recording a studio album.  Despite controversy surrounding its production and sound quality, the album debuted to moderate praise and was supported by the band's first tour in six years, including first-ever concerts in Mexico City and Brazil, where they played to some of the largest crowds of their career.  The album was certified gold in Canada in August 2002.

Jagori Tanna: Jagori Tanna (born "Andrew Koshowski", in Hamilton, Ontario) is a Canadian musician.  Together with his brother, Christian Tanna, he formed I Mother Earth around 1990.  He wrote almost all of I Mother Earth's music, and produced much of it as well.  He won a Juno Award in 2000 for Best Recording Engineer (with Paul Northfield) for the band's singles "Summertime in the Void" and "When Did You Get Back From Mars?" .

Kscope: Kscope is an independent record label that is part of Snapper Music, and a sister-label of Peaceville.  It is dedicated to artists in the progressive rock genre.  The label has released albums by Steven Wilson and his projects Porcupine Tree, No-Man and Blackfield.  In 2008 it branched out and has since signed the post-progressive artists Anathema, Lunatic Soul and Ulver, and progressive rock stalwart Ian Anderson to their roster.  In 2013, the Steven Wilson release The Raven That Refused To Sing (and Other Stories) received the Album of the Year award at the Progressive Music Awards.

Porcupine Tree: Porcupine Tree were an English rock band formed by musician Steven Wilson in 1987.  The band began essentially as a solo project for Wilson, who created all of the band's music.  However, by 1993, Wilson desired to work in a band environment, and so brought on frequent collaborators Richard Barbieri on keyboards, Colin Edwin on bass and Chris Maitland on drums as permanent band members.  With Wilson still in charge of guitar and lead vocals, this would remain the lineup until 2001, when the band recruited Gavin Harrison to replace Maitland on drums.

OSI (band): OSI is an American progressive rock band, originally formed by Fates Warning guitarist Jim Matheos in 2002.  Chroma Key keyboardist and vocalist Kevin Moore is the only other full-time member of the band.  The collaboration may be considered a studio project, as its members and contributors write and track most of their material independently, sharing and developing tracks long-distance, only coming together at the end of the process for mixing and additional tracking.  The band's name is a reference to the Office of Strategic Influence, a short-lived American government agency formed in 2001 to support the War on Terror through propaganda.  The band has featured a number of guest musicians on its albums, including Sean Malone, Steven Wilson, Mikael Åkerfeldt, Joey Vera and Gavin Harrison.

Paul Northfield: Paul Northfield is a prolific British record producer and sound engineer, who has worked on albums by bands like Dream Theater, Queensrÿche, Rush, Porcupine Tree and Suicidal Tendencies.

Up the Downstair: Up the Downstair is the second studio album by British progressive rock band Porcupine Tree, first released in May 1993.  It was originally intended to be a double album set including the song "", which was instead released as a single in 1992, and other material that ended up on the "Staircase Infinities" EP (1994).  In 2005, it was partially re-recorded, fully re-mixed, remastered and re-released along with the "Staircase Infinities" EP as a double album.  The re-release contains a new mix by Steven Wilson, along with recorded drums by Gavin Harrison that replace the electronic drums of the original version.  Steven Wilson has stated that the title of the album came from a line in the song "Voyage 34."  There is still a title track, however.  Another re-release on double vinyl was pressed on 14 August 2008 on Kscope records.  This is identical to the 2005 release, except it is printed on coloured vinyl and the "Staircase Infinities" disc contains the song "Phantoms".

Tarquin's Seaweed Farm: Tarquin's Seaweed Farm, subtitled "Words from a Hessian Sack", is the first album to be released by Steven Wilson under the name "Porcupine Tree".  It was originally a compiled cassette of experimental music made by Steven Wilson for his joke band he formed with his friend Malcom Stocks.  The cassette was only sent out to a few people, but was enough to give the band a bit of fame in the UK underground music scene of the time, being picked up by the underground magazine Freakbeat.  It was later released under Delerium Records in 1991 in a limited edition of 300 copies.  Eventually, the tracks from this and the later Porcupine Tree album "The Nostalgia Factory" were compiled into what are considered Porcupine Tree's first true studio albums, "On the Sunday of Life" and "Yellow Hedgerow Dreamscape".

Supporting paragraphs: Paul Northfield Porcupine Tree
Answer: 1987