Question: When did the author of season 7 of game of thrones begin writing Winds of Winter?

full_context: Document 1: Game of Thrones (season 8): The eighth and final season of the fantasy drama television series Game of Thrones was announced by HBO in July 2016. Unlike the first six seasons that each had ten episodes and the seventh that had seven episodes, the eighth season will have only six episodes. Like the previous season, it will largely consist of original content not found currently in George R.R. Martin's A Song of Ice and Fire series, and will instead adapt material Martin has revealed to showrunners about the upcoming novels in the series, The Winds of Winter and A Dream of Spring.
Document 2: Game of Thrones: Season Ordered Filming First aired Last aired Novel (s) adapted Refs Season 1 March 2, 2010 Second half of 2010 April 17, 2011 June 19, 2011 A Game of Thrones Season 2 April 19, 2011 Second half of 2011 April 1, 2012 June 3, 2012 A Clash of Kings and some early chapters from A Storm of Swords Season 3 April 10, 2012 July -- November 2012 March 31, 2013 June 9, 2013 About the first two - thirds of A Storm of Swords Season 4 April 2, 2013 July -- November 2013 April 6, 2014 June 15, 2014 The remaining one - third of A Storm of Swords and some elements from A Feast for Crows and A Dance with Dragons Season 5 April 8, 2014 July -- December 2014 April 12, 2015 June 14, 2015 A Feast for Crows, A Dance with Dragons and original content, with some late chapters from A Storm of Swords and elements from The Winds of Winter Season 6 July -- December 2015 April 24, 2016 June 26, 2016 Original content and outline from The Winds of Winter, with some late elements from A Feast for Crows and A Dance with Dragons Season 7 April 21, 2016 August 2016 -- February 2017 July 16, 2017 August 27, 2017 Original content and outline from The Winds of Winter and A Dream of Spring Season 8 July 30, 2016 October 2017 -- Mid 2018 2018 / 19 2018 / 19
Document 3: A Song of Ice and Fire: # Title Pages Chapters Words Audio US release A Game of Thrones 694 73 292,727 33h 53m August 1996 A Clash of Kings 768 70 318,903 37h 17m February 1999 A Storm of Swords 973 82 414,604 47h 37m November 2000 A Feast for Crows 753 46 295,032 31h 10m November 2005 5 A Dance with Dragons 1040 73 414,788 48h 56m July 2011 6 The Winds of Winter Forthcoming 7 A Dream of Spring Forthcoming Total 4,228 344 1,736,054 198h 53m
Document 4: Game of Thrones (season 7): Depending upon the release of George R.R. Martin's forthcoming The Winds of Winter, the seventh season may comprise original material not found in the A Song of Ice and Fire series. According to previous reports, some of the show's sixth season had consisted of material revealed to the writers of the television series during discussions with Martin.
Document 5: A Song of Ice and Fire: A Song of Ice and Fire is a series of epic fantasy novels by the American novelist and screenwriter George R.R. Martin. He began the first volume of the series, A Game of Thrones, in 1991, and it was published in 1996. Martin, who initially envisioned the series as a trilogy, has published five out of a planned seven volumes. The fifth and most recent volume of the series published in 2011, A Dance with Dragons, took Martin six years to write. He is still writing the sixth novel, The Winds of Winter.
Document 6: A Song of Ice and Fire: A Song of Ice and Fire is a series of epic fantasy novels by the American novelist and screenwriter George R.R. Martin. He began the first volume of the series, A Game of Thrones, in 1991 and had it published in 1996. Martin, who initially envisioned the series as a trilogy, has published five out of a planned seven volumes. The fifth and most recent volume of the series published in 2011, A Dance with Dragons, took Martin five years to write. He is still writing the sixth novel, The Winds of Winter.
Document 7: A Song of Ice and Fire: # Title Pages Chapters Words Audio US release A Game of Thrones 694 73 292,727 33h 53m August 1996 A Clash of Kings 768 70 318,903 37h 17m February 1999 A Storm of Swords 973 82 414,604 47h 37m November 2000 A Feast for Crows 753 46 295,032 31h 10m November 2005 5 A Dance with Dragons 1056 73 414,788 48h 56m July 2011 6 The Winds of Winter Forthcoming 7 A Dream of Spring Forthcoming Total 4,228 344 1,736,054 198h 53m
Document 8: A Song of Ice and Fire: Martin believes the last two volumes of the series will be big books of 1500 manuscript pages each. The sixth book will be called The Winds of Winter, taking the title of the last book of the originally planned trilogy. Displeased with the provisional title A Time for Wolves for the final volume, Martin ultimately announced A Dream of Spring as the title for the seventh book in 2006. Martin said in March 2012 that the final two novels will take readers farther north than any of the previous books, and that the Others will appear in the book.
Document 9: Game of Thrones (season 7): On April 21, 2016, HBO officially ordered the seventh season of Game of Thrones, just three days prior to the premiere of the show's sixth season. According to an interview with co-creators David Benioff and D.B. Weiss, the seventh season would likely consist of fewer episodes, stating at the time of the interview that they were ``down to our final 13 episodes after this season. We're heading into the final lap. ''Director Jack Bender, who worked on the show's sixth season, said that the seventh season would consist of seven episodes. Benioff and Weiss stated that they were unable to produce 10 episodes in the show's usual 12 to 14 month time frame, as Weiss said`` It's crossing out of a television schedule into more of a mid-range movie schedule.'' HBO confirmed on July 18, 2016, that the seventh season would consist of seven episodes, and would premiere later than usual in mid-2017 because of the later filming schedule. Later it was confirmed that the season would debut on July 16. According to a report by Entertainment Weekly, the seventh season of the series includes its longest episode, with the finale running for 81 minutes. The penultimate episode also runs for 71 minutes -- around 16 minutes longer than an average Game of Thrones episode. The first five episodes mostly run longer than average (55 minutes), at 59, 59, 63, 50, and 59 minutes respectively. The previous longest episode in the series was the sixth - season finale, ``The Winds of Winter '', which ran 69 minutes.
Document 10: Game of Thrones (season 8): The eighth and final season of the fantasy drama television series Game of Thrones was announced by HBO in July 2016. Unlike the first six seasons that each had ten episodes and the seventh that had seven episodes, the eighth season will have only six episodes. Like the previous season, it will largely consist of original content not found currently in George R.R. Martin's A Song of Ice and Fire series and will also adapt material Martin has revealed to showrunners about the upcoming novels in the series, The Winds of Winter and A Dream of Spring.
Document 11: Game of Thrones (season 8): The eighth and final season of the fantasy drama television series Game of Thrones was announced by HBO in July 2016. Unlike the first six seasons that each had ten episodes and the seventh that had seven episodes, the eighth season will have only six episodes. Like the previous season, it will largely consist of original content not found currently in George R.R. Martin's A Song of Ice and Fire series and will instead adapt material Martin has revealed to showrunners about the upcoming novels in the series, The Winds of Winter and A Dream of Spring.
Document 12: A Song of Ice and Fire: A Song of Ice and Fire is a series of epic fantasy novels by the American novelist and screenwriter George R.R. Martin. He began the first volume of the series, A Game of Thrones, in 1991 and had it published in 1996. Martin, who initially envisioned the series as a trilogy, has published five out of a planned seven volumes. The fifth and most recent volume of the series published in 2011, A Dance with Dragons, took Martin six years to write. He is still writing the sixth novel, The Winds of Winter.
Document 13: A Game of Thrones: In the novel, recounting events from various points of view, Martin introduces the plot - lines of the noble houses of Westeros, the Wall, and the Targaryens. The novel has inspired several spin - off works, including several games. It is also the namesake and basis for the first season of Game of Thrones, an HBO television series that premiered in April 2011. A March 2013 paperback TV tie - in re-edition was also titled Game of Thrones, excluding the indefinite article ``A ''.
Document 14: A Song of Ice and Fire: The Winds of Winter will resolve the cliffhangers from A Dance with Dragons early on and ``will open with the two big battles that (the fifth book) was building up to, the battle in the ice and the battle (...) of Slaver's Bay. And then take it from there. ''By the middle of 2010, Martin had already finished five chapters of The Winds of Winter from the viewpoints of Sansa Stark, Arya Stark, Arianne Martell, and Aeron Greyjoy, accumulating to around 100 completed pages. After the publication of A Dance with Dragons in 2011, Martin announced he would return to writing in January 2012. He spent the meantime on book tours, conventions, and continued working on his The World of Ice & Fire companion guide and a new Tales of Dunk and Egg novella.
Document 15: A Song of Ice and Fire: A Song of Ice and Fire A Song of Ice and Fire book collection box set cover A Game of Thrones (1996) A Clash of Kings (1998) A Storm of Swords (2000) A Feast for Crows (2005) A Dance with Dragons (2011) The Winds of Winter (forthcoming) A Dream of Spring (forthcoming) Author George R.R. Martin Country United States Language English Genre Epic fantasy Publisher Bantam Books (US, Canada) Voyager Books (UK, Australia) Published August 1996 -- present Media type Print (hardback & paperback) audiobook
ground_truth: 2010
sub_queries: who is writing season 7 of game of thrones Answer: George R.R. Martin
when did George R.R. Martin start writing winds of winter Answer: 2010