Question: When did the King who the most valuable sovereign was struck for die?

full_context: Document 1: 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 2: Saint George the Victorious (coin): The Russian George the Victorious (Russian: монета Георгий Победоносец ) coins are bullion coins issued in gold and silver by the Central Bank of Russia. The gold coins have a face value of 50 rubles and have been minted since 2006. The silver coins are Russia's first bullion coins in that metal; they have a face value of 3 rubles and have been minted since 2009.
Document 3: Fifty pence (British coin): The British decimal fifty pence (50p) coin – often pronounced "fifty pee" – is a unit of currency equaling one half of a pound sterling. It is a seven-sided coin formed as an equilateral-curve heptagon, or Reuleaux polygon, a curve of constant width, meaning that the diameter is constant across any bisection. Its obverse has featured the profile of Queen Elizabeth II since the coin’s introduction in 1969. Four different portraits of the Queen have been used, with the latest design by Jody Clark being introduced in 2015. The second and current reverse, featuring a segment of the Royal Shield, was introduced in 2008.
Document 4: Ten pence (British coin): The British decimal ten pence (10p) coin – often pronounced "ten pee" – is a unit of currency equalling ten one-hundredths of a pound sterling. Its obverse has featured the profile of Queen Elizabeth II since the coin's introduction in 1968, replacing the two shilling coin in preparation for decimalisation in 1971. Four different portraits of the Queen have been used on the coin, with the latest design by Jody Clark being introduced in 2015. The second and current reverse, featuring a segment of the Royal Shield, was introduced in 2008.
Document 5: George V: George V (George Frederick Ernest Albert; 3 June 1865 – 20 January 1936) was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936.
Document 6: 1936 in the United Kingdom: Events from the year 1936 in the United Kingdom. The year is notable for the death of George V early in the year, the accession of his son Edward VIII (previously styled David, Prince of Wales) to the throne, and then Edward VIII's abdication, resulting in the accession to the throne of his younger brother George VI (previously Albert, Duke of York).
Document 7: List of Prime Ministers of King Edward VIII: King Edward VIII was the King of the United Kingdom and the Dominions and colonies of the British Commonwealth, Emperor of India, from 20 January to 11 December 1936, when he abdicated the throne.
Document 8: Five pence (British coin): The British decimal five pence (5p) coin – often pronounced "five pee" – is a unit of currency equaling five one-hundredths of a pound sterling. Its obverse has featured the profile of Queen Elizabeth II since the coin’s introduction on 23rd April 1968, replacing the shilling in preparation for decimalisation in 1971. A smaller version of the coin was introduced in June 1990 with the older coins being withdrawn on 31st December 1990. Four different portraits of the Queen have been used, with the latest design by Jody Clark being introduced in 2015. The second and current reverse, featuring a segment of the Royal Shield, was introduced in 2008.
Document 9: Twenty pence (British coin): The British decimal twenty pence (20p) coin – often pronounced "twenty pee" – is a unit of currency equal to 20/100 of a pound sterling. Like the 50p coin, it is an equilateral curve heptagon. Its obverse has featured the profile of Queen Elizabeth II since the coin's introduction on June 9th 1982. Four different portraits of the Queen have been used; the latest design by Jody Clark was introduced in 2015. The second and current reverse (as of 2017), featuring a segment of the Royal Shield, was introduced in 2008.
Document 10: Half sovereign: The half sovereign is an English and British gold coin with a face value half that of a sovereign: equivalent to half a pound sterling, ten shillings, or 120 old pence. Since the end of the gold standard, it has been issued only in limited quantities as a commemorative coin with a sale price and resale value far in excess of its face value. The main reason for this is because they are used, along with other coins of this type as bullion coins.
Document 11: 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 12: Sovereign (British coin): The sovereign is a gold coin of the United Kingdom, with a nominal value of one pound sterling. Prior to 1932 it was a fully circulating coin within Britain's then Gold Standard currency. Today it is used as a bullion coin and is sometimes mounted in jewellery. The most valuable sovereign is the British Edward VIII 1937 struck for Edward VIII who abdicated, therefore these coins never entered circulation, and an example of one was purchased at auction in 2014 for £516,000.
Document 13: Edward VII: Edward VII (Albert Edward; 9 November 1841 – 6 May 1910) was King of the United Kingdom and the British Dominions and Emperor of India from 22 January 1901 until his death in 1910.
Document 14: Edward VIII abdication crisis: In 1936, a constitutional crisis in the British Empire arose when King-Emperor Edward VIII proposed to marry Wallis Simpson, an American socialite who was divorced from her first husband and was pursuing a divorce of her second.
Document 15: British twenty-five pence coin: The commemorative British decimal twenty-five pence (25p) coin was issued in four designs between 1972 and 1981. These coins were a post-decimalisation continuation of the traditional crown, with the same value of a quarter of a pound sterling. Uniquely in British decimal coinage, the coins do not have their value stated on them. This is because previous crowns rarely did so.
ground_truth: 28 May 1972