Question: Pat Smear joined what American rock band, co-founded by Kurt Cobain, as a touring guitarist?

full_context: Document 1: List of Foo Fighters band members: Foo Fighters is an American alternative rock band formed by multi-instrumentalist and vocalist Dave Grohl in 1994. After recording the album "Foo Fighters" alone, Grohl enlisted guitarist Pat Smear, bassist Nate Mendel and drummer William Goldsmith to join the band. This lineup recorded the second Foo Fighters album, 1997's "The Colour and the Shape", although most of Goldsmith's drum recordings were removed and re-recorded by Grohl for the release, after he left the band due to creative tensions. Goldsmith was replaced by Taylor Hawkins, and Franz Stahl replaced Smear after he also departed, although he only remained in the band for a short period and did not record an album with the group. The group's third album, "There Is Nothing Left to Lose", featured Hawkins on drums and was released in 1999.
Document 2: Cut Me Some Slack: "Cut Me Some Slack" is a song by Paul McCartney, Dave Grohl, Krist Novoselic and Pat Smear from Grohl's film "Sound City" and its . The song was first performed at the by the four, and was released on December 14, 2012, through YouTube. The song was a jam featuring McCartney and the surviving members of Nirvana, and it was described by McCartney as a "Nirvana reunion". The four also performed the song, along with a number of Beatles songs, at a Paul McCartney concert in Seattle (Nirvana's home town) on June 19, 2013.
Document 3: Smitten (The Martinis album): Smitten is an album released by The Martinis in 2004, under the label, Cooking Vinyl. It is often regarded as similar-sounding to the work by alt-rock band, the Pixies, as the guitarist, Joey Santiago is a member of both bands. The record also features drums by Josh Freese, a member of The Vandals and A Perfect Circle. The album took over two years to create.
Document 4: A Little Tiny Smelly Bit of...the Stinky Puffs: A Little Tiny Smelly Bit of... The Stinky Puffs is The Stinky Puffs first release following the band's self-titled debut in 1991. It includes four songs recorded in the studio, followed by the same four songs recorded live at the Capitol Theater in Olympia, Washington as part of the Yoyo A Go Go Festival in July 1994. "Pizza Break" acts as an intermission between the two recordings. The album is notable for containing the first live performances of Nirvana members Krist Novoselic and Dave Grohl following the death of Kurt Cobain, whom the track "I'll Love You Anyway" was written about. The live tracks also feature Ira Kaplan of Yo La Tengo.
Document 5: Dan Peters: Daniel Joe Peters (born August 18, 1968) is the drummer for Mudhoney. He joined Bundle of Hiss when he was fifteen years old. He also played drums for Nirvana, appearing on one single, "Sliver". Peters' only live appearance with Nirvana was on September 22, 1990, in Seattle, Washington, at the Motor Sports International Garage. Peters continues to drum for Mudhoney, and was replaced in Nirvana by Dave Grohl. Peters expressed his only regret as missing the chance to play drums on "Nevermind". He returned to Mudhoney for the recording of "Every Good Boy Deserves Fudge". He has stayed with Mudhoney ever since. Mudhoney's latest offering is "Vanishing Point" released April 2, 2013. Peters has also played drums for Ellensburg, Washington based band Screaming Trees from 1990 to 1991. He also appeared in Black Sheep alongside David Spade and Chris Farley. He is married to a prominent litigator with the Seattle-based, Emerald Law Group. She was formerly a partner with the venerable law firm, Scott, Kinney & Mack pllc.
Document 6: List of songs recorded by Nirvana: Nirvana was an American rock band formed by singer/guitarist Kurt Cobain and bassist Krist Novoselic in Aberdeen, Washington in 1987, with drummer Dave Grohl joining the band in 1990. Though their brief run ended following the death of Kurt Cobain in 1994, Nirvana has come to be regarded as one of the most influential and important rock bands of the modern era.
Document 7: So You Fell in Love with a Musician...: So You Fell In Love With A Musician... is the second solo album by guitarist Pat Smear, released by SST Records in 1992. A music video, filmed by Dave Markey, was made for the song "Innocent X". The year following this album's release, Smear joined grunge band Nirvana as a touring guitarist.
Document 8: Nirvana (band): Nirvana was an American rock band formed by singer and guitarist Kurt Cobain and bassist Krist Novoselic in Aberdeen, Washington, in 1987. Nirvana went through a succession of drummers, the longest-lasting being Dave Grohl, who joined in 1990. Despite releasing only three full-length studio albums in their seven-year career, Nirvana has come to be regarded as one of the most influential and important alternative bands in history. Though the band dissolved in 1994 after the death of Cobain, their music maintains a popular following and continues to influence modern rock and roll culture.
Document 9: Pat Smear: Georg Albert Ruthenberg (born August 5, 1959), better known by the stage name Pat Smear, is an American guitarist and occasional actor. Smear was a founding member of the influential punk band the Germs, and was the additional live rhythm guitarist for the grunge band Nirvana. He currently plays guitar in the rock band Foo Fighters, with whom he has recorded three studio albums and a live album.
Document 10: Soundgarden: Soundgarden is an American rock band formed in Seattle, Washington, in 1984 by singer and rhythm guitarist Chris Cornell, lead guitarist Kim Thayil, and bassist Hiro Yamamoto. Matt Cameron became the band's full-time drummer in 1986, while bassist Ben Shepherd became a permanent replacement for Yamamoto in 1990. The band dissolved in 1997 and reformed in 2010. Cornell remained in Soundgarden until his death in May 2017, putting the band's future in doubt and leaving Thayil as the only remaining original member of the band.
Document 11: Dave Foster: Dave Foster is an American musician who was the third drummer for the grunge rock band Nirvana. He was fired after playing only a couple of performances with the band, mostly because of his inability to attend rehearsal sessions regularly. Foster lived hours away from Kurt Cobain and bassist Krist Novoselic back in Aberdeen, Washington, which required the men to pick Foster up and bring him to the band's rehearsal space in Tacoma. Based on Cobain's own account, this made band practices complicated.
Document 12: Foo Fighters: Foo Fighters is an American rock band, formed in Seattle, Washington in 1994. It was founded by Nirvana drummer Dave Grohl as a one-man project following the dissolution of Nirvana after the death of Kurt Cobain. The group got its name from the UFOs and various aerial phenomena that were reported by Allied aircraft pilots in World War II, which were known collectively as "foo fighters".
Document 13: Kurt Cobain: Kurt Donald Cobain (February 20, 1967 – April 5, 1994) was an American musician, artist, singer, songwriter, guitarist and poet. Born in Aberdeen, Washington, Cobain formed the band Nirvana with Krist Novoselic in 1987 and established it as part of the Seattle music scene and grunge genre. Nirvana's debut album "Bleach" was released on the independent record label Sub Pop in 1989.
Document 14: Aaron Burckhard: Aaron Burckhard (November 14, 1963 - Present) is an American musician who was the first drummer recruited for Kurt Cobain and Krist Novoselic's rock group that soon came to be known as Nirvana. Burckhard performed as a part of this band until December 1987. Burckhard was no longer a part of Nirvana by the time it recorded its first demo at Reciprocal Recordings in Seattle on January 23, 1988 (Dale Crover of Melvins served as his replacement).
Document 15: John Frusciante discography: The discography of John Frusciante, who is best known as the former guitarist of the rock band Red Hot Chili Peppers, consists of eleven solo albums and four EPs, as well as two albums with collaborators Joe Lally and Josh Klinghoffer under the name Ataxia and one EP and one album under the alias of Trickfinger. Frusciante left the Red Hot Chili Peppers in 1992 after he got tired of the growing success of the band. He released his first solo album, "Niandra LaDes and Usually Just a T-Shirt", in 1994 on American Recordings. His second record, "Smile From the Streets You Hold", was released in 1997 and later taken off the market at his request in 1999. After returning to the Red Hot Chili Peppers in 1998, Frusciante recorded "Californication" with the band and subsequently released his third solo album, "To Record Only Water for Ten Days", in February 2001 on Warner Music Group.
ground_truth: Nirvana