Question: Who has performed with more band, Trey Anastasio or Sarah Nixey?

full_context: Document 1: Phish: Phish is an American rock band that was founded at the University of Vermont in 1983. The band is known for musical improvisation, extended jams, blending of genres, and a dedicated fan base. The current line-up—guitarist and lead vocalist Trey Anastasio, bassist and vocalist Mike Gordon, drummer and vocalist Jon Fishman, and keyboardist and vocalist Page McConnell—performed together for 15 years before going on hiatus from October 7, 2000, to December 30, 2002. They resumed touring from December 31, 2002 until August 15, 2004, when they announced that the Coventry Festival would be their last show. They reunited in March 2009 for a series of three consecutive concerts played in the Hampton Coliseum in Hampton, Virginia, and have since resumed performing regularly.
Document 2: One Man's Trash: One Man's Trash is Trey Anastasio's first solo album apart from Phish, recorded in the Fungus Factory or in The Barn between 1997 and 1998 during breaks of touring and recording with Phish. The release includes early experimental noise explorations, some of which were reincarnated later into his second album, "Trey Anastasio", released in 2002. "One Man's Trash" was released on October 27, 1998.
Document 3: Sarah Cracknell: Sarah Cracknell (born 12 April 1967; Chelmsford, Essex, England) is an English singer-songwriter, best known as the lead singer of the electronic music band Saint Etienne.
Document 4: The Worst of Black Box Recorder: The Worst of Black Box Recorder is a 2001 album by Black Box Recorder, whose members include Luke Haines, Sarah Nixey and John Moore. It is a compilation of B-sides from the singles of "England Made Me" and "The Facts Of Life".
Document 5: Russ Lawton: Russ Lawton is a professional drummer from Vermont. He is best known as the drummer from the solo band of Phish guitarist Trey Anastasio. Lawton also performs with the Vermont jam band Strangefolk and The Chrome Cowboys. Lawton performed on Mike Gordon's albums "Inside In" and "The Green Sparrow".Recently, Russ sat in with the Vermont-based "Book'em Blues Band" for an evening of blues and rock on April 14, 2009 at Nectar's in Burlington, Vermont. Among those Russ has a worked with is Ish drummer Jason Osborn. Lawton recently appeared on Late Night With Jimmy Fallon with Trey Anastasio Band.
Document 6: Sarah (Thin Lizzy song): "Sarah" is a pop song released in 1979 by Irish rock group Thin Lizzy, included on their album, "". The song was written by the band's frontman Phil Lynott and guitarist Gary Moore about Lynott's newborn daughter. The song was also issued as a single, and appeared on several compilation albums including "". The song was never performed live by Thin Lizzy, but it was adopted as a live favourite by Lynott's post-Thin Lizzy project, Grand Slam, and featured on "Live in Sweden 1983", a recording of Lynott's solo band.
Document 7: England Made Me (album): England Made Me is the debut studio album by English indie rock band Black Box Recorder, whose members include Luke Haines, Sarah Nixey and John Moore, released in July 1998 via Chrysalis Records.
Document 8: Trey Anastasio (album): Trey Anastasio is a self-titled album by the guitarist and composer Trey Anastasio. It was released on April 30, 2002 by Elektra Records and recorded at "The Barn", his studio near Westford, Vermont. Some of the songs included are evolved, but much less experimental versions of tracks on Anastasio first solo album, "One Man's Trash", released in 1998. The tracks included were written by Anastasio, along with Tom Marshall, Tony Markellis, Russ Lawton and Scott Herman.
Document 9: Sing, Memory: Sing, Memory is the debut album from British Black Box Recorder vocalist, Sarah Nixey. Recorded in London, and produced by James Banbury, the album is split into two halves, "Sing" and "Memory". The title is probably a reference to Vladimir Nabokov's autobiography, "Speak, Memory". It was released in the UK on February 19, 2007.
Document 10: Sarah Nixey: Sarah Anne Nixey (born 21 December 1973 in Dorset, England) is a British singer songwriter, best known as the vocalist in Black Box Recorder. Her debut solo album, "Sing, Memory", was released on 19 February 2007, followed by "Brave Tin Soldiers", released on 9 May 2011. Nixey currently lives in London with her husband, music producer Jimmy Hogarth, whom she married in late 2010 and has one son, Reuben (born late 2007) and a daughter, Lola (born late 2012). Nixey has a daughter, Ava (born 2001) from her previous marriage with John Moore.
Document 11: Backing musicians for Trey Anastasio: Since 1998, Trey Anastasio, best known from Phish, has toured and recorded with several backup musicians, including several side-projects organized and led by the guitarist and composer. While active, his bands did not have a name. Fans commonly referred to them as Trey Anastasio Band, or TAB for short or "The Two for Five band". This group should not be confused with the current Trey Anastasio Band, which was renamed in 2006 from its original name 70 Volt Parade.
Document 12: G3 (tour): G3 is a concert tour organized by guitarist Joe Satriani featuring him alongside two other guitarists. Since its inception in 1995, G3 has toured most years and has featured many guitarists, including Steve Vai (Satriani's former student), Eric Johnson, Kenny Wayne Shepherd, Yngwie Malmsteen, John Petrucci, Robert Fripp, Paul Gilbert, Steve Morse, Steve Lukather, Uli Jon Roth, Michael Schenker, Adrian Legg and many other special guests, including Tony MacAlpine, Johnny Hiland, Keith More, Chris Duarte, Andy Timmons, Neal Schon, Gary Hoey, Brian May, Billy Gibbons, Johnny A, George Lynch, Patrick Rondat, Guthrie Govan, Alejandro Silva, and Eric Sardinas.
Document 13: Trey Anastasio: Ernest Joseph "Trey" Anastasio III ( , born September 30, 1964) is an American guitarist, composer, and vocalist noted for his work with the band Phish, and his solo career, including the Trey Anastasio Band and the orchestral "Evenings with Trey Anastasio" performed with the New York Philharmonic, the Los Angeles Philharmonic, the Atlanta Symphony Orchestra, the Baltimore Symphony, the Pittsburgh Symphony, and the Colorado Symphony.
Document 14: Tony Markellis: Tony Markellis is a bassist and record producer from Helena, Montana, now residing in Saratoga Springs, New York. In his forty-five year career he has played blues, folk, jazz, rock and country music with musicians such as Trey Anastasio, Paul Butterfield, The Mamas & the Papas, Johnny Shines, David Bromberg, David Amram, Paul Siebel, Rosalie Sorrels, Eric Von Schmidt, Ellen McIlwaine, Mary McCaslin, Railbird and Jo Henley. Markellis was a founding member of the groundbreaking Vermont-based jazz fusion group Kilimanjaro, as well as the Unknown Blues Band featuring Big Joe Burrell. In the late 1990s, Markellis became the first member of the first solo band of Phish guitarist Trey Anastasio, forming the rhythm section with drummer Russ Lawton. Including his work with Anastasio, Markellis has appeared on over one hundred albums. In addition to tours with the Trey Anastasio Band, he is currently working with Kilimanjaro, acoustic blues power trios No Outlet and Street Corner Holler, The Burns Sisters Band, bluegrass fusion band Floodwood, acoustic Grateful Dead cover band Dead2Me, singer/songwriters Michael Jerling and Bob Warren, and occasionally with Americana band Jo Henley. On June 20, 2010 (Fathers Day), Tony was invited on stage at Saratoga Performing Arts Center (SPAC) to play bass with Phish on "Gotta Jibboo" (one of the songs he cowrote with Trey and Russ Lawton for the Trey Anastasio Band). Phish's bassist, Mike Gordon played the second guitar during the song.
Document 15: Sarah Shannon: Sarah Shannon is a female vocalist best known for her work in the band Velocity Girl. Shannon has released two solo albums: "Sarah Shannon" (2002, Casa Recording Co.) and "City Morning Song" (2007, Minty Fresh). She also joined Styrofoam to record the song "I Found Love." In addition, she fronted the short-lived band Starry Eyes, which put out a short EP and played one live show at the Black Cat club in Washington D.C. Other members of the band included former members of Velocity Girl and Shades Apart. She is currently a member of The Not-Its!, a children's music rock band. Shannon currently lives in Seattle, Washington.
ground_truth: Trey Anastasio