Question: John Frusciante returned after 6 years to the Red Hot Chili Peppers on their 7th album, released in 1999 on Warner Bros. Records. Who did he replace on guitar?

Context paragraphs:
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.

Red Hot Chili Peppers 1984 Tour: Red Hot Chili Peppers 1984 Tour was a concert tour by Red Hot Chili Peppers to support their 1984 debut album, "The Red Hot Chili Peppers".  Following the band's brief first tour the previous year, original members, Hillel Slovak and Jack Irons left the band to tour and record with their own band, What Is This?  who had also obtained a record contract shortly before the Chili Peppers did.  Slovak and Irons considered the Chili Peppers a side project and What Is This?  to have the brighter future.  In late 1983, auditions were held and Irons was quickly replaced by Cliff Martinez, best known for his work with The Weirdos, The Dickies and Captain Beefheart.  Dix Denney, Martinez's Weirdo's bandmate was close to becoming the band's new guitarist however after a few rehearsals they felt Denney's style didn't match what the band wanted.  Through further auditions it came down to a guy named Mark Nine and Jack Sherman.  The band had no clue as to who Sherman was or how he got to the audition but knew he was the best fit because he instantly clicked musically with bassist Flea and Martinez.

Californication Tour: The Californication Tour was a worldwide concert tour by Red Hot Chili Peppers to support their seventh studio album "Californication" which saw the return of guitarist John Frusciante who rejoined the band in 1998 after quitting six years earlier.

Mother's Milk: Mother's Milk is the fourth studio album by American funk rock band Red Hot Chili Peppers, released on August 16, 1989, by EMI Records.  After the death of founding guitarist Hillel Slovak and subsequent departure of drummer Jack Irons, vocalist Anthony Kiedis and bassist Flea regrouped with the addition of guitarist John Frusciante and drummer Chad Smith.  Frusciante's influence altered the band's sound by placing more emphasis on melody than rhythm, which had dominated the band's previous material.  Returning producer Michael Beinhorn favored heavy metal guitar riffs as well as overdubbing that was perceived by Frusciante as excessive, and as a result Beinhorn and Frusciante constantly fought over the album's guitar sound.

Automatic Writing (album): Automatic Writing is the debut studio album by American experimental rock band Ataxia, released on August 10, 2004 on Record Collection.  Ataxia consisted of then-Red Hot Chili Peppers guitarist John Frusciante, Joe Lally of Fugazi, and Josh Klinghoffer, Frusciante's subsequent successor in the Red Hot Chili Peppers.

Ataxia (band): Ataxia was a short-lived American experimental rock band formed in 2004 by guitarist John Frusciante (Red Hot Chili Peppers), bassist Joe Lally (Fugazi) and drummer Josh Klinghoffer (Red Hot Chili Peppers, Dot Hacker, The Bicycle Thief), who later succeeded Frusciante as the lead guitarist of the Red Hot Chili Peppers.

Hump de Bump: "Hump de Bump" is a song by the Red Hot Chili Peppers from their 2006 double album, "Stadium Arcadium".  The song is the fifth and final single released from "Stadium Arcadium" and final single the band would release with John Frusciante, who quit the band two years later.  Originally expected to be the fourth single for the US, Canada and Australia, ("Desecration Smile" was the fourth single released internationally) the Red Hot Chili Peppers decided to make the single and video a worldwide release thanks to the positive feedback on the video, which was directed by comedian and good friend Chris Rock.  The single was released in the US on April 7, 2007 while it was released May 10, 2007 in the rest of the world.

Californication (album): Californication is the seventh studio album by American rock band Red Hot Chili Peppers.  It was released on June 8, 1999, on Warner Bros.  Records and was produced by Rick Rubin.  "Californication" marked the return of John Frusciante, who had previously appeared on "Mother's Milk" and "Blood Sugar Sex Magik", to replace Dave Navarro as the band's guitarist.  Frusciante's return was credited with changing the band's sound altogether, producing a notable shift in style from the music recorded with Navarro.  The album's subject material incorporated various sexual innuendos commonly associated with the band, but also contained more varied themes than previous outings, including lust, death, contemplations of suicide, California, drugs, globalization, and travel.

Red Hot Chili Peppers 1983 Tour: The Red Hot Chili Peppers 1983 Tour was the first-ever concert tour by Red Hot Chili Peppers.  Originally formed as a joke band called "Tony Flow And The Miraculously Majestic Masters Of Mayhem" by bassist Flea, guitarist, Hillel Slovak and drummer, Jack Irons, all friends from high school.  They asked fellow high school friend, Anthony Kiedis to join them onstage for their first-ever show at the Hollywood, California venue known as The Rhythm Lounge.  Kiedis had previously been a MC to introduce his friend's former bands.  However, this time Kiedis was asked to sing.  With one song, a made-up rap Kiedis created called "Out In L.A.", the band took to the stage as an opening act for Neighbor's Voices.  The club owner was so impressed by their performance he told them to return the following week with another song.  The band quickly wrote "Get Up and Jump" and played it at that second show.  In early March 1983 the band made the name change to the Red Hot Chili Peppers.  The band first made a name for themselves on their local club scene when they played the famous Kit Kat Club by doing their now famous socks on cocks routine (this would become a trademark for the band and something they would do on occasion for many years).  After this performance, Lindy Goetz decided to be their manager, a role he would hold until 1999.  The 1983 tour consisted of shows mostly in the band's homestate of California except for one show in Nevada.  A 10-song demo tape was recorded with Spit Stix, drummer for the punk band Fear, which Flea was briefly with.

Exquisite Corpse (EP): Exquisite Corpse is the debut EP by American alternative rock band Warpaint, self-released in late 2008 and subsequently re-released on October 6, 2009 on Manimal Vinyl.  Recorded in 2007, the EP was mixed by then-Red Hot Chili Peppers guitarist John Frusciante, and features current Red Hot Chili Peppers guitarist Josh Klinghoffer performing drums on "Billie Holiday" and guitar on "Krimson".

Supporting paragraphs: Californication Tour Californication (album)
Answer: Dave Navarro