Question: When was the band that Ruben Romano left in 1997 formed?

Context articles: Zero 7
In Search Of... (Fu Manchu album)
Daredevil (Fu Manchu album)
Eatin' Dust
No One Rides for Free
Nebula (band)
Ruben Ramos
Fu Manchu (band)
Eddie Glass
The Action Is Go

Zero 7 are an English musical duo consisting of Henry Binns and Sam Hardaker.
 They began as studio engineers and in 1997 formed the group Zero 7.
 Their debut album, "Simple Things", was released in 2001.
 Subsequent albums include "When It Falls", "The Garden", and "Yeah Ghost".
In Search Of... is the third studio album by Fu Manchu, a stoner rock band from Southern California.
 It was released in 1996 on Mammoth Records.
 This was the last album with Ruben Romano and Eddie Glass.
 Shortly after its release, they left to form the band Nebula.
Daredevil is the second studio release from Fu Manchu, a Southern Californian stoner rock band, released on the Bong Load Custom Records label in 1995.
 This album features the "classic" Fu Manchu line-up of Scott Hill, Brad Davis, Ruben Romano, and Eddie Glass.
Eatin' Dust is the fifth studio album from stoner rock band Fu Manchu, released on February 19, 1999 on the now defunct Man's Ruin label.
 "Eatin' Dust" was the second album for new members Brant Bjork and Bob Balch, who replaced Ruben Romano and Eddie Glass in 1997.
 The first three tracks were originally released as the "Godzilla" EP, a limited-edition 10" on Man's Ruin Records.
 Josh Homme of Kyuss and Queens of the Stone Age played additional percussion during that three-track session, and Mike Coopersmith (an alias of Scott Hill) played lead guitar in place of Bob Balch.
 The rest of the album features the band's normal lineup.
 The first track "Godzilla" is a Blue Öyster Cult cover.
 Man's Ruin later re-issued the album on 12" vinyl (including the "Godzilla" EP) and renamed it "(Godzilla's) Eatin' Dust".
No One Rides for Free is Southern Californian stoner rock band Fu Manchu's debut album.
 This is the only record with Mark Abshire on bass guitar; he was replaced by Brad Davis.
 Mark Abshire later teamed up with Eddie Glass and Ruben Romano to form the power trio Nebula.
 This album is produced by later Fu Manchu and then Kyuss drummer Brant Bjork.
 A 20-year anniversary edition was released in 2014.
Nebula are an American rock band, formed by guitarist Eddie Glass and drummer Ruben Romano upon departing Fu Manchu in 1997.
 Mark Abshire soon joined as the band's original bassist.
 Nebula have been on indefinite hiatus since early 2010 but have not broken up.
Ruben Ramos, also known as El Gato Negro, is an American Tejano music performer.
 Beginning his music career in the late 1960s, Ruben's fame as has grown throughout the years as he formed his own distinct sound of music.
 In March 1998, Ruben was inducted into the Tejano Music Awards Hall of Fame and later won Best Male Vocalist in 1999.
 His band, The Mexican Revolution, also won album of the year in 2008.
 In January 2009 at the 51st annual Grammy awards, Ramos & the Revolution won the 2009 Grammy for "Best Tejano album of the Year."
Fu Manchu is an American, Southern California-based stoner rock band that formed in 1985.
Eddie Glass (born December 19, 1970) is an American rock musician best known for his work with punk band Olivelawn, and stoner rock bands Nebula, and Fu Manchu.
 Nebula has been Glass' primary musical group since 1997, when he and drummer Ruben Romano acrimoniously split from Fu Manchu.
The Action is Go is the fourth studio album by California stoner rock group Fu Manchu.
 It features new drummer Brant Bjork (Kyuss) and new lead guitarist Bob Balch, replacing Eddie Glass and Ruben Romano, who left to form the band Nebula.
 According to an AllMusic review, the new lineup provided Fu Manchu with "the impetus and inspiration to really start moving forward," and the resulting album demonstrates the band's "punk energy, classic rock drive, psychedelic crunch, and heavy-ass grind all at once."
 The album was produced by Jay Noel Yuenger of White Zombie, who contributed some additional instrumentation.