Question: In Albert Cox's native country, who was the king that abdicated?

full_context: Document 1: George VI: George VI (Albert Frederick Arthur George; 14 December 1895 -- 6 February 1952) was King of the United Kingdom and the Dominions of the British Commonwealth from 11 December 1936 until his death. He was the last Emperor of India and the first Head of the Commonwealth.
Document 2: Trena Cox: Trena Mary Cox (1895–1980) was an English stained glass artist. She was born Emma Trina Cox on 3 March 1895, in the Lower Bebington Urban District (i.e. not Bebbington), on the Wirral Peninsula and grew up around Birkenhead. She trained at the Laird School of Art. In 1924 she moved to Chester and set up her studio in Victoria Road Chester, Cheshire, either adjacent to, or within, the Kaleyard works of Williams, Gamon & Co., with whom she remained associated until the Second World War. In about 1945, Trena Cox moved to 96 Watergate Street, Chester, which remained her home and, at least later, her studio, until she retired in 1972 (at the age of 77) and died, on 11 February 1980 (not in 1977, as frequently quoted). Most of her works are in churches in the old counties of Cheshire and Lancashire. She was a fellow of the British Society of Master Glass Painters. The authors of the "Buildings of England" series comment that "her windows are usually small, her figures modest, often with small-scale detail in the quarries" (small pieces of square or diamond-shaped glass set diagonally).
Document 3: Edward VIII: Edward VIII (Edward Albert Christian George Andrew Patrick David; 23 June 1894 -- 28 May 1972) was King of the United Kingdom and the Dominions of the British Empire, and Emperor of India, from 20 January 1936 until his abdication on 11 December the same year.
Document 4: Nottingham Trent University tram stop: Nottingham Trent University is a tram stop on Nottingham Express Transit (NET) in the city of Nottingham suburb of the Arboretum. It is located in the centre of Nottingham Trent University's city campus, between the Boots Library and the Chaucer Building. The university's flagship Arkwright and Newton buildings are nearby to the south, although Newton is closer to the Royal Centre stop. On either side of the stop, the tram tracks share the road with other traffic, but only trams are permitted to pass through the stop itself. The stop has two side platforms on either side of the twin tracks.
Document 5: Albert Cox: Albert Edward Harrison Cox (24 June 1917 in Treeton, Rotherham – April 2003) was a footballer who played as a left-back for Sheffield United and Halifax Town.
Document 6: Fred Cox: Frederick William Cox is a former National Football League kicker who played for the Minnesota Vikings throughout his career (1963–1977).
Document 7: Edward VII: Edward VII (Albert Edward; 9 November 1841 – 6 May 1910) was King of the United Kingdom of Great Britain and Ireland and Emperor of India from 22 January 1901 until his death in 1910.
Document 8: Coton in the Elms: Coton in the Elms is a village and parish in the English county of Derbyshire. At 70 miles from the coast, it is the furthest place in England from the sea. The population of the civil parish as of the 2011 census was 896. It is located 5 miles southwest of Swadlincote and 6 miles south of Burton upon Trent.
Document 9: George VI: George VI (Albert Frederick Arthur George; 14 December 1895 -- 6 February 1952) was King of the United Kingdom and the Dominions of the British Commonwealth from 11 December 1936 until his death in 1952. He was the last Emperor of India and the first Head of the Commonwealth.
Document 10: Coton in the Elms: Coton in the Elms is a village and parish in the English county of Derbyshire. At 70 miles (113 km) from the coast, it is the furthest place in the United Kingdom from coastal waters. The population of the civil parish as of the 2011 census was 896. It is located 5 miles southwest of Swadlincote and 6 miles south of Burton upon Trent.
Document 11: Richard Edghill: He spent the majority of his career with his home town club, Manchester City. He spent numerous seasons in the Premier League and remained with the club through several relegations, followed by several promotions. He also appeared for Birmingham City in a loan spell and after leaving City in 2002 he moved on to Wigan Athletic. Spells with Sheffield United, Queens Park Rangers and Bradford City followed before ending his career with Macclesfield Town. He was capped by both England U21 and England B.
Document 12: Rother FM: Rother FM is an Independent Local Radio station for Rotherham, South Yorkshire, England. Rother FM is now based in Doncaster. The Station began broadcasting in October 2006 from its studios at Aspen Court in Templeborough. It mainly covers the Rotherham Borough from its transmitter at Boston Castle, although it can be heard in neighbouring cities such as Sheffield.
Document 13: Edward VIII: Edward VIII (Edward Albert Christian George Andrew Patrick David; 23 June 1894 -- 28 May 1972) was King of the United Kingdom and the Dominions of the British Empire, and Emperor of India, from 20 January 1936 until his abdication on 11 December the same year, after which he became the Duke of Windsor.
Document 14: Alan Shackleton: Alan Shackleton (3 February 1934 – 26 April 2009) was an English football player. He played for Burnley, Leeds United, Everton and Oldham Athletic. Despite good early scoring form at Leeds and Everton, he left for non-league football in the early 1960s.
Document 15: Treeton: Treeton is a village and civil parish of the Metropolitan Borough of Rotherham in South Yorkshire, England. It is located about south of the town of Rotherham and east of Sheffield City Centre.
ground_truth: Edward VIII
sub_queries: Albert Cox >> place of birth Answer: Treeton
Which state is Treeton located? Answer: England
who was the king of England that abdicated Answer: Edward VIII