Question: Who was replaced by Jon Walker in a band that Jake Sinclair had wrote songs for?

full_context: Document 1: Death of a Bachelor: Death of a Bachelor is the fifth studio album by American rock band Panic! at the Disco, released January 15, 2016 on Fueled by Ramen and DCD2. It is the follow-up to the band's fourth studio album, "Too Weird to Live, Too Rare to Die!" (2013), with the entire album written and recorded by lead vocalist/multi-instrumentalist Brendon Urie, among external writers. It is the band's first album to not feature drummer Spencer Smith and also follows bassist Dallon Weekes' departure from the official line-up, subsequently becoming a touring member once again.
Document 2: Jake Sinclair (musician): Jake Sinclair (born March 7, 1985) is an American record producer, audio engineer, mixing engineer, multi-instrumentalist, vocalist, and songwriter. His production, engineering, songwriting, and mixing credits include Weezer, Fall Out Boy, Panic! at the Disco, 5 Seconds of Summer, Pink, New Politics, Andrew McMahon in the Wilderness, Gin Wigmore, and Train. Sinclair co-wrote and produced Panic! at the Disco's "Death of a Bachelor" album (which debuted at number one on the US Billboard 200) and produced Weezer's 2016 "Weezer (White Album)". Both were nominated for Best Rock Album at the 59th Annual Grammy Awards. He co-wrote and produced "Uma Thurman" by Fall Out Boy, which debuted at number one on the U.S. iTunes Chart, reached number 22 on the Billboard Hot 100, and was certified 2X Platinum by the RIAA in December 2015. Sinclair received a Grammy nomination for Album of the Year for his work as engineer and bassist on Taylor Swift's "Everything Has Changed" alongside producer Butch Walker. He co-wrote and produced the debut single, "She Looks So Perfect" by 5 Seconds of Summer that peaked at number one in over five countries and won "Song of the Year" at the 2014 ARIA Awards. Sinclair is the former bassist of the indie/pop rock band The Films and the lead singer and producer of the indie pop duo Alohaha.
Document 3: Jack Joseph Puig: Jack Joseph Puig is an American audio engineer and record producer. He has worked with Tonic, Hole, Jellyfish, The Black Crowes, John Mayer, Weezer, Fiona Apple, Roger Hodgson, Taxiride, Green Day, Counting Crows, No Doubt, Klaxons, Panic! at the Disco, Stone Temple Pilots, U2, and many others. Puig has shared Grammy Awards with The Goo Goo Dolls, Sheryl Crow, Vanessa Carlton, John Mayer, Fergie (The Black Eyed Peas), U2, and No Doubt. In 2006 Jack Joseph Puig became an executive vice president at Interscope-Geffen-A&M Records. He has signed Klaxons and Charlotte Sometimes. As an A&R man he works with Shirley Manson, Ashlee Simpson, Klaxons, Charlotte Sometimes, Counting Crows, Puddle of Mudd, and The Like.
Document 4: Jake Bass: Jake Bass (born December 13, 1989 in Detroit) is an American composer and music producer. Jake is the son of Jeff Bass who is half of the Bass Brothers production team that discovered Eminem. Jake has produced tracks for Bizarre (rapper) from D12 including his song "Fat Boy" off the Blue Cheese & Coney Island record. He has also worked closely with deaf rapper Sean Forbes producing all of his tracks and performing live with him. They released a full-length album in the fall of 2012 with all songs produced by Bass called "Perfect Imperfection". Later that year, Jake and his father Jeff Bass composed the music for Chrysler's Big Finish 2012 ad campaign. Jake also composed the music for the Ovation (TV channel) television series, "Motor City Rising" in 2012. Bass then released his debut single titled, "One" in October 2013 which featured two instrumental songs as well as a music video Directed by Stefan Vardon. In December 2013, Jake released his full-length debut instrumental album "1989". In July of 2016 Bass released his second instrumental album "My City: Detroit."
Document 5: Jake Gosling: Jake Gosling is an English music producer, songwriter, remixer, manager, and publisher best known for his work with artists such as Ed Sheeran, The Libertines, James Bay, Shawn Mendes, All Time Low, One Direction, Christina Perri, Paloma Faith, and Wiley. He received the ASCAP award 2014 as a writer for hit song "Lego House" and was named "Music Week"' s Producer of 2012 after work on Sheeran's album "+", as well as being the predominant producer on x (Multiply), Paloma Faith's "Fall to Grace", and One Direction's "Up All Night" and "Take Me Home", in which he produced Number 1 UK and worldwide hit single "Little Things". Gosling has remixed under the pseudonym Sketch Iz Dead for Lady Gaga, Timbaland & Nelly Furtado, Keane (band), Keri Hilson, and Far East Movement. Gosling runs his own recording studio Sticky Studios in Surrey. Gosling and Sarah Liversedge run a joint venture publishing company called "The Movement London Limited". Gosling is signed as a songwriter to BDi Music Limited and is a full member of the Music Producers Guild. He was nominated at the 58th Annual Grammy Awards for Record of the Year with "Thinking Out Loud". He has also won the Brit Award for 'Album of the Year' in 2015 with Sheeran's x. Gosling has been nominated twice at the Brit Awards for Producer of the Year. He was nominated at the 2015 Grammy Awards for Best Album with x.
Document 6: Panic! at the Disco: Panic! at the Disco is an American rock band from Las Vegas, Nevada, formed in 2004 and featuring the current lineup of vocalist Brendon Urie, accompanied on tour by bassist Dallon Weekes, guitarist Kenneth Harris and drummer Dan Pawlovich. Founded by childhood friends Ryan Ross, Spencer Smith, Brent Wilson and Urie, Panic! at the Disco recorded its first demos while its members were in high school. Shortly after, the band recorded and released its debut studio album, "A Fever You Can't Sweat Out" (2005). Popularized by the second single, "I Write Sins Not Tragedies", the album was certified double platinum in the US. In 2006, founding bassist Brent Wilson was fired from the band during an extensive world tour and subsequently replaced by Jon Walker.
Document 7: Vices &amp; Virtues: Vices & Virtues is the third studio album by American rock band Panic! at the Disco, released on March 22, 2011 on Fueled by Ramen. Produced by John Feldmann and Butch Walker, the album was recorded as a duo by vocalist and multi-instrumentalist Brendon Urie and drummer Spencer Smith, following the departure of lead guitarist, backing vocalist and primary lyricist Ryan Ross and bassist/backing vocalist Jon Walker in July 2009. The album's artwork was conceptualized by touring bassist Dallon Weekes who was inducted as a full-time member of the band near the end of recording.
Document 8: Spencer Smith (musician): Spencer James Smith (born September 2, 1987) is an American musician. He is best known as a co-founding member and the former drummer of the rock band Panic! at the Disco. He recorded four studio albums with the band: "A Fever You Can't Sweat Out" (2005), "Pretty. Odd." (2008), "Vices & Virtues" (2011), and "Too Weird to Live, Too Rare to Die!" (2013). The band's debut album went Platinum and charted at No. 13 on the US "Billboard" 200, spearheaded by the hit single "I Write Sins Not Tragedies", which peaked at No. 7 in the "Billboard" Hot 100.
Document 9: Panic! at the Disco discography: Panic! at the Disco is an American rock band that originated in Las Vegas, Nevada. Their 2005 debut album, "A Fever You Can't Sweat Out", reached number 13 on the US "Billboard" 200, and has sold more than 2.2 million copies since its September 2005 release, spearheaded by the platinum top 10 hit single, "I Write Sins Not Tragedies". The band's second album, "Pretty. Odd.", was released on March 21, 2008, entering the US chart at, and peaking at, number 2. Their third effort, "Vices & Virtues", was released on March 18, 2011, and peaked at number 7 in the US. Their fourth album, 2013's "Too Weird to Live, Too Rare to Die!", entered the US chart at, and peaked at, number 2, and contained the gold certified lead single "Miss Jackson". The band's fifth studio album, "Death of a Bachelor", was released in January 2016 and became their first Number 1 album in the US.
Document 10: List of Panic! at the Disco band members: Panic! at the Disco is an American rock band from Las Vegas, Nevada, formed in 2004 and featuring the current lineup of lead vocalist Brendon Urie, accompanied on tour by bassist Dallon Weekes, lead guitarist Kenneth Harris, and drummer Dan Pawlovich. The group was originally formed by former members Spencer Smith and Ryan Ross. The band has gone through multiple line-up changes in their career spanning five albums. There have been six official members of Panic! at the Disco, six touring members and twenty-six session members.
Document 11: Alex Salibian: Alex Salibian is a music producer signed to Grammy-winning producer Jeff Bhasker's production company. His most recent work includes producer and co-writer of Harry Styles solo debut album Harry Styles (album) as well as producer and co-writer of Young the Giant’s third album Home of the Strange. Alex is also the musical director of Harry Styles’s band, starting with his performance on Saturday Night Live on April 15th, 2017
Document 12: Jeff Bhasker: Jeff Bhasker (also known as Billy Kraven and U.G.L.Y.) is an American record producer, songwriter, keyboardist, vocalist, and multi-instrumentalist. He collaborated with rapper and producer Kanye West on the albums "808s & Heartbreak", "My Beautiful Dark Twisted Fantasy", and "Watch the Throne". He has won Grammy Awards for the songs "Run This Town" by Jay-Z, "All of the Lights" by Kanye West, "We Are Young" by Fun., and "Uptown Funk" by Mark Ronson. Bhasker received the 2016 Grammy Award for Producer of the Year, Non-Classical for co-producing Mark Ronson's album "Uptown Special" and producing Nate Ruess's album "Grand Romantic" among other records.
Document 13: Greg Wells: Greg Wells is a Canadian multiple Grammy nominated musician, record producer and songwriter based in Los Angeles. Wells has songs on over 85 million units sold. He has produced and written with Adele, Dua Lipa, Keith Urban, Twenty One Pilots, Mika (singer), Rufus Wainwright, Katy Perry, Mayer Hawthorne,Theophilus London, Weezer, Kid Cudi, OneRepublic, Grace VanderWaal, Ariana Grande, Kelly Clarkson, Pink, Pharrell Williams, Rascal Flatts, Holychild, Ella Eyre, The All American Rejects, Otep, Deftones, Aerosmith, Burt Bacharach, Celine Dion, Crash Test Dummies, Elton John, Jars of Clay, and the Count Basie Orchestra.
Document 14: Brendon Urie: Brendon Boyd Urie (born April 12, 1987) is an American singer, songwriter, musician and multi-instrumentalist. He is best known as the lead vocalist of Panic! at the Disco, of which he is the sole remaining original member.
Document 15: Too Weird to Live, Too Rare to Die!: Too Weird to Live, Too Rare to Die! is the fourth studio album by American rock band Panic! at the Disco, released on October 8, 2013 on Decaydance and Fueled by Ramen. Recorded as a three-piece, the album was produced by Butch Walker, and is the first and only album to feature bassist Dallon Weekes as an official member and the last to feature drummer Spencer Smith.
ground_truth: Brent Wilson