Question: Who is the son of the performer of Slip Slidin' Away?

full_context: Document 1: Menlo Park (band): It featured Harper Simon, Paul Simon's son. Also, its drummer was Seb Rochford, who won the BBC Rising Star Jazz Award in 2004 and leads the Mercury Prize-nominated experimental-jazz group Polar Bear.
Document 2: 50 Ways to Leave Your Lover: ``50 Ways to Leave Your Lover ''is a song by the American singer - songwriter Paul Simon. It was the second single from his fourth studio album, Still Crazy After All These Years (1975), released on Columbia Records. Backing vocals on the single were performed by Patti Austin, Valerie Simpson, and Phoebe Snow. The song features a recognizable repeated drum riff performed by drummer Steve Gadd.
Document 3: 50 Ways to Leave Your Lover: "50 Ways to Leave Your Lover" is a song by the American singer-songwriter Paul Simon. It was the second single from his fourth studio album, "Still Crazy After All These Years" (1975), released on Columbia Records. Backing vocals on the single were performed by Patti Austin, Valerie Simpson, and Phoebe Snow. The song features a recognizable repeated drum riff performed by drummer Steve Gadd.
Document 4: 50 Ways to Leave Your Lover: ``50 Ways to Leave Your Lover ''is a song by the American singer - songwriter Paul Simon featuring Peter, Paul, and Mary. It was the second single from his fourth studio album, Still Crazy After All These Years (1975), released on Columbia Records. Backing vocals on the single were performed by Patti Austin, Valerie Simpson, and Phoebe Snow. The song features a recognizable repeated drum riff performed by drummer Steve Gadd.
Document 5: Graceland (song): "Graceland" is the title song of the album "Graceland", released in 1986 by Paul Simon. The song features vocals by The Everly Brothers.
Document 6: Joo Yeon Sir: A former pupil at the Purcell School, Joo Yeon Sir is a Scholar at the Royal College of Music, London where she studies with Dr Felix Andrievsky. She has been a major prizewinner at national and international competitions in the UK and abroad and has performed as recitalist, chamber musician and soloist with orchestras at various venues including the Wigmore Hall, London Arts Club, St James's Palace in presence of HRH Prince Charles, the Foundling Museum as part of New London Orchestra Young Performer's Concert Series supported by the MBF, and most recently at Fairfield Halls performing Vaughan Williams' The Lark Ascending.
Document 7: Southampton: The city is home or birthplace to a number of contemporary musicians such as R'n'B singer Craig David, Coldplay drummer Will Champion, former Holloways singer Rob Skipper as well as 1980s popstar Howard Jones. Several rock bands were formed in Southampton, including Band of Skulls, The Delays, Bury Tomorrow, Heart in Hand, Thomas Tantrum (disbanded in 2011) and Kids Can't Fly (disbanded in 2014). James Zabiela, a highly regarded and recognised name in dance music, is also from Southampton.
Document 8: Slipping Away (The Rolling Stones song): "Slipping Away" is a song by the Rolling Stones featured on their 1989 album "Steel Wheels". It is sung by guitarist Keith Richards.
Document 9: Greatest Hits, Etc.: Greatest Hits, Etc. is the first greatest hits album by American singer-songwriter Paul Simon, released in November 1977 by Columbia Records. It was his first compilation, spanning the first six years of his solo career. Its release was prompted by the fact that two years after his last studio album, Simon didn't yet have enough material to release a new full-length album, and his contract with Columbia was finished but a new album was needed to fulfill it. Simon later signed with Warner Bros. Records. The album was initially supposed to be called "Blatant Greatest Hits".
Document 10: Slip Slidin' Away: "Slip Slidin' Away" is a 1977 song written and recorded by Paul Simon, from his compilation album "Greatest Hits, Etc.". It was one of two new songs to appear on the album, the other being "Stranded in a Limousine". Backing vocals on the song are provided by The Oak Ridge Boys. The song was originally recorded and considered for Simon's 1975 album "Still Crazy After All These Years", but Simon decided not to include the song on the finished album. A demo version appears on the 2004 re-issue of the album. The song was also included on "Negotiations and Love Songs" (1988).
Document 11: Maurice Simon: A high school classmate of Eric Dolphy (1945-6) Simon appears on an early 1945 Los Angeles recording in a band led by Russell "Illinois" Jacquet and which also included Teddy Edwards, Charles Mingus, Bill Davis and Chico Hamilton.
Document 12: Plymouth: Antarctic explorers Robert Falcon Scott and Frank Bickerton both lived in the city. Artists include Beryl Cook whose paintings depict the culture of Plymouth and Robert Lenkiewicz, whose paintings investigated themes of vagrancy, sexual behaviour and suicide, lived in the city from the 1960s until his death in 2002. Illustrator and creator of children's series Mr Benn and King Rollo, David McKee, was born and brought up in South Devon and trained at Plymouth College of Art. Jazz musician John Surman, born in nearby Tavistock, has close connections to the area, evidenced by his 2012 album Saltash Bells. The avant garde prepared guitarist Keith Rowe was born in the city before establishing the jazz free improvisation band AMM in London in 1965 and MIMEO in 1997. The musician and film director Cosmo Jarvis has lived in several towns in South Devon and has filmed videos in and around Plymouth. In addition, actors Sir Donald Sinden and Judi Trott. George Passmore of Turner Prize winning duo Gilbert and George was born in the city, as was Labour politician Michael Foot whose family reside at nearby Trematon Castle.
Document 13: Sligo Jazz Project: It has featured Avishai Cohen, Rufus Reid, Paul Wertico, John Riley, Jean Toussaint, Martin Taylor, John Goldsby, Soweto Kinch, Alec Dankworth, Michael Manring, Yellow Jackets, John Taylor, Reggie Washington, Ulf Wakenius, Andreas Oberg, Anita Wardell, Dominique DiPiazza, Norma Winstone, Cleveland Watkiss, Todd Coolman and key Irish jazz musicians such as Louis Stewart, Mike Nielsen, Linley Hamilton, Michael Buckley and David Lyttle. In 2011, Sligo Jazz Project had over eighty participants from twelve different countries and offered full bursaries to four exceptional young musicians.
Document 14: Never Let Her Slip Away: "Never Let Her Slip Away" is a song written by Andrew Gold, who recorded it for his third album, "All This and Heaven Too". The single reached #5 on the UK Singles Chart, and #67 on the "Billboard" Hot 100 in 1978. Queen frontman Freddie Mercury contributed harmony vocals to the song, as an uncredited background singer. A 1992 cover version by dance outfit Undercover was also an international hit.
Document 15: Simon & Garfunkel: Simon & Garfunkel were an American folk rock duo consisting of singer - songwriter Paul Simon and singer Art Garfunkel. They were one of the best - selling music groups of the 1960s and became counterculture icons of the decade's social revolution, alongside artists such as the Beatles, the Beach Boys, and Bob Dylan. Their biggest hits -- including ``The Sound of Silence ''(1964),`` Mrs. Robinson'' (1968), ``The Boxer ''(1969), and`` Bridge over Troubled Water'' (1970) -- reached number one on singles charts worldwide.
ground_truth: Harper Simon
sub_queries: Slip Slidin' Away >> performer Answer: Paul Simon
Paul Simon >> child Answer: Harper Simon