Question: Who is the writer of the British television sitcom for which David Jason is best known for his portrayal of Derek "Del Boy" Trotter?

full_context: Document 1: John Nettles: John Vivian Drummond Nettles, OBE (born 11 October 1943) is a British actor and writer. Nettles is perhaps best known for playing the lead roles in the long-running television series "Bergerac" and "Midsomer Murders".
Document 2: Bruce Alexander (actor): Bruce John Alexander (born 18 June 1946 in Watford, Hertfordshire) is an English actor, best known for his portrayal of Superintendent Norman Mullet in the ITV television series "A Touch of Frost", where he plays the superior of the main character Jack Frost, played by David Jason.
Document 3: Last of the Summer Wine: Last of the Summer Wine is a British sitcom created and written by Roy Clarke that was originally broadcast on the BBC. It premiered as an episode of "Comedy Playhouse" on 4 January 1973, and the first series of episodes followed on 12 November 1973. From 1983 to 2010, Alan J. W. Bell produced and directed all episodes of the show. The BBC confirmed on 2 June 2010 that "Last of the Summer Wine" would no longer be produced and the 31st series would be its last. Subsequently, the final episode was broadcast on 29 August 2010. Tom Owen criticised the BBC for not permitting a special final episode. Roy Clarke, however, stated that he was fully aware this was the last series, and preferred the show to have a quiet ending. The final line was said by Peter Sallis, the longest serving actor. Since its original release, all 295 episodes comprising, thirty-one series—including the pilot and all Specials—have been released on DVD. Repeats of the show are broadcast in the UK on Gold, Yesterday, and Drama. It is also seen in more than twenty-five countries, including various PBS stations in the United States and on VisionTV in Canada. "Last of the Summer Wine" is the longest-running comedy programme in Britain and the longest-running sitcom in the world.
Document 4: John Lyons (actor): John Lyons (born 14 September 1943) is an English stage and screen actor. He is probably most famous for appearing as Detective Sergeant George Toolan in the long-running UK detective drama, "A Touch of Frost" (1992–2010) alongside David Jason. He also appeared as the Barman / Milkman / Decorator (Credit to http://www.imdb.com/name/nm0529090/): "The Twenty Six Year Itch"(1979)..Barman; "And So to Bed"(1978)..Milkman; "My Husband Next Door"(1976)..Decorator in 3 episodes of George & Mildred, and in On the buses (Season 7, Ep. 7 and 11) as a bus driver. John also had a prominent role playing Detective Sgt Jim Huke in a 1976 episode of The Sweeney called "Bad Apple", and as an armed blagger called Mead in the feature film from the same series - Sweeney 2.
Document 5: The Green Green Grass: The Green Green Grass is a BBC television sitcom, created and initially written by John Sullivan, produced by Shazam Productions for the BBC. It is a sequel/spin-off of the long running sitcom "Only Fools and Horses" and stars John Challis, Sue Holderness and Jack Doolan. Four series and three Christmas specials were originally broadcast on BBC One between 2005 and 2009.
Document 6: Sport Relief 2014 Special: The Sport Relief special, also referred to as "Beckham in Peckham" was an edition of the BBC sit-com, "Only Fools and Horses", recorded as part of the "Sport Relief 2014" appeal. It was screened on 21 March 2014. Actors David Jason and Nicholas Lyndhurst reprised their roles as Del Boy and Rodney in the sketch written by Jim Sullivan and Dan Sullivan, which included previously unused material written by their father John Sullivan, who created and wrote every episode of the series. David Beckham guest starred. Beckham was also the person that got in touch with Jim Sullivan, the son of the late "Only Fools and Horses" creator John Sullivan about doing something for "Sport Relief 2014".
Document 7: Open All Hours: Open All Hours is a BBC television sitcom created and written by Roy Clarke for the BBC. It ran for 26 episodes in four series, which premiered in 1976, 1981, 1982 and 1985. The programme developed from a television pilot broadcast in Ronnie Barker's comedy anthology series, "Seven of One" (1973). "Open All Hours" ranked eighth in the 2004 Britain's Best Sitcom poll. A sequel, entitled "Still Open All Hours", was created in 2013.
Document 8: List of Only Fools and Horses episodes: The following is an episode list for the BBC One sitcom "Only Fools and Horses". The show was first broadcast in the United Kingdom on BBC One on 8 September 1981. It ran for seven series and sixteen Christmas Specials until 25 December 2003, when the final episode was broadcast. In total, 64 regular episodes of "Only Fools and Horses", all written by John Sullivan, were produced. All are now available on both Region 2 and Region 1 DVD.
Document 9: Comic Relief special: The "Comic Relief special" was an edition of the BBC sit-com, "Only Fools and Horses", recorded as part of the 1997 Comic Relief appeal. It was first screened on 14 March 1997. It was chronologically set before the 1996 Christmas trilogy. This special was the final appearance of Uncle Albert.
Document 10: David Soul: David Soul (born August 28, 1943) is an American-British actor and singer. He is known for his role as Detective Kenneth "Hutch" Hutchinson in the ABC television series "Starsky & Hutch" from 1975 to 1979. He became a British citizen in 2004.
Document 11: Del Boy: Derek Edward Trotter, more commonly known as Del Boy (born 12 July 1945), is the fictional lead character in the popular BBC sitcom "Only Fools and Horses" and one of the main characters of its prequel, "Rock & Chips". He was played by David Jason in the original series and was portrayed as a teenager by James Buckley in the prequel. Del is known for his broken French quotes which are usually completely out of context and a variety of catchphrases, including: "He who dares – wins!", "This time next year we'll be millionaires", "Lovely Jubbly!", "You know it makes sense" (which he usually says to his customers after they've agreed on a deal) and "You plonker!" (which he usually says to Rodney).
Document 12: Diamond Geezer: Diamond Geezer is a British television crime drama, broadcast on ITV1 between March 20, 2005 and April 23, 2007. Created by Caleb Ranson, the series stars David Jason as jewel thief and professional con man Des. Two series of the programme were broadcast. A third series was not commissioned due to falling viewing figures, and Jason filming the first full series of "A Touch of Frost" since 2002.
Document 13: David Jason: Sir David John White, {'1': ", '2': ", '3': ", '4': "} (born 2 February 1940), better known by his stage name David Jason, is an English actor and comedian. He is perhaps best known for his portrayals of Derek "Del Boy" Trotter in the BBC comedy series "Only Fools and Horses", and Detective Inspector Jack Frost in the ITV crime drama "A Touch of Frost".
Document 14: Only Fools and Horses: Only Fools and Horses is a British television sitcom created and written by John Sullivan. Seven series were originally broadcast on BBC One in the United Kingdom from 1981 to 1991, with sixteen sporadic Christmas specials aired until the end of the show in 2003. Episodes are regularly repeated on UKTV comedy channel Gold, Yesterday and occasionally repeated on BBC One.
Document 15: Frost at Christmas: Frost at Christmas (1984) is the first of the series of novels written by R. D. Wingfield, the creator of the character Detective Inspector Jack Frost, who is more famously known in the television series "A Touch of Frost", where the character is played by Sir David Jason. This novel was adapted into the TV episode 'Care and Protection', which was also the first in the series.
ground_truth: John Sullivan