Question: What son of Queen Mary died on the August 1942 Dunbeath Air Crash?

full_context: Document 1: 1952 Bermuda air crash: The 1952 Bermuda air crash occurred on 6 December 1952, when a Douglas DC-4, registered CU-T397 and operated by Cubana de Aviación, flying from Madrid to Havana, crashed into the Atlantic Ocean following a refuelling stop at Kindley Air Force Base in Bermuda. There were 33 passengers and 8 crew on board the aircraft. The flight arrived at Kindley Air Force Base at 03:30. After an hour's stopover spent refuelling the aircraft, the DC-4 departed; at 04:45, during the initial climb, the aircraft stalled, lost height and crashed tail first into the sea. The accident killed 37 passengers and crew; three passengers and a crewmember survived the crash, and were rescued shortly after the crash.
Document 2: 1948 Heathrow Disaster: The 1948 Heathrow Disaster was the crash of a Douglas DC-3C of the Belgian airline Sabena at Heathrow Airport, London, United Kingdom on 2 March 1948. It was the first major accident at Heathrow Airport; of the 22 people on board 20 were killed, of whom most had British nationality.
Document 3: 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 4: Prince George of Denmark: Prince George of Denmark and Norway, Duke of Cumberland (Danish: "Jørgen" ; 2 April 165328 October 1708), was the husband of Queen Anne, who reigned over Great Britain from 1702.
Document 5: August 1926 Air Union Blériot 155 crash: The August 1926 Air Union Blériot 155 crash happened on 18 August 1926 at Hurst, Kent when Blériot 155 F-AIEB of Air Union hit a barn and crashed whilst attempting to make a forced landing in bad weather. Two passengers were killed in the accident, and the pilot died a day later.
Document 6: Alfred, Duke of Saxe-Coburg and Gotha: Alfred (Alfred Ernest Albert; 6 August 184430 July 1900) reigned as Duke of Saxe-Coburg and Gotha from 1893 to 1900. He was the second son and fourth child of Queen Victoria of the United Kingdom and Prince Albert of Saxe-Coburg and Gotha. He was known as the Duke of Edinburgh from 1866 until he succeeded his paternal uncle Ernest II as the reigning Duke of Saxe-Coburg and Gotha in the German Empire.
Document 7: Prince George of Cambridge: Prince George of Cambridge (George Alexander Louis; born 22 July 2013) is the elder child and only son of Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge. He is third in line of succession to the British throne, after his paternal grandfather, and father.
Document 8: Prince Richard, Duke of Gloucester: Prince Richard, Duke of Gloucester, {'1': ", '2': ", '3': ", '4': "} (Richard Alexander Walter George; born 26 August 1944) is the youngest grandchild of King George V and Queen Mary. He practised as an architect until the death of his elder brother placed him in direct line to inherit his father's dukedom of Gloucester, which he inherited, as the second duke, in 1974. He is currently 24th in the line of succession to the British throne. He is also the senior male line descendant of three British monarchs: Victoria, Edward VII and George V .
Document 9: Prince Georg of Hanover: Prince Georg of Hanover ("Georg Paul Christian Prinz von Hannover"), Duke of Brunswick-Lüneburg (born 9 December 1949 at Schloss Salem in Salem, Baden-Württemberg, Germany). Georg is the second eldest son of Prince George William of Hanover and his wife Princess Sophie of Greece and Denmark, an elder sister of Prince Philip, Duke of Edinburgh. Georg is a male-line descendant of George III of the United Kingdom and Charlotte of Mecklenburg-Strelitz and a descendant of Albert, Prince Consort and Victoria of the United Kingdom through their daughters Victoria, Princess Royal and Princess Alice of the United Kingdom. He is a first cousin of Charles, Prince of Wales and nephew of Prince Philip, Duke of Edinburgh and Elizabeth II of the United Kingdom.
Document 10: August 1942 Dunbeath Air Crash: The August 1942 Dunbeath Air Crash involved the loss of a Mark 3 Short S.25 Sunderland that crashed in the Scottish Highlands on a headland known as Eagle's Rock near Dunbeath, Caithness on 25 August 1942. The crash killed 14 of 15 passengers and crew, including HRH Prince George, Duke of Kent who was on duty as an Air Commodore in the Royal Air Force on a mission to Reykjavik; a loss keenly felt by the British Prime Minister. A Royal Air Force Board of Inquiry determined that the crash was the result of a navigational error by the crew.
Document 11: Prince George William of Great Britain: Prince George William of Great Britain (13 November 1717 – 17 February 1718) was an infant member of the British royal family, second son of George II and Caroline of Ansbach who, at the time of his birth, were the Prince and Princess of Wales. He died aged 3 months, 4 days.
Document 12: Widerøe Flight 933: Widerøe Flight 933, also known as the Mehamn Accident (Norwegian: "Mehamn-ulykken" ), was the crash of a de Havilland Canada DHC-6 Twin Otter operated by Norwegian airline Widerøe. The Twin Otter crashed into the Barents Sea off Gamvik, Norway on 11 March 1982 at 13:27, killing all fifteen people on board. The results of the four official investigations were that the accident was caused by structural failure of the vertical stabilizer during clear-air turbulence. A mechanical fault in the elevator control system caused the pilots to lose control of the aircraft's up-and-down movement (called pitch); and either a series of stalls or a high-speed gust of wind caused the aircraft to lose altitude without the ability of the crew to counteract, resulting in the failure of the vertical stabilizer.
Document 13: Prince George, Duke of Kent: Prince George, Duke of Kent, {'1': ", '2': ", '3': ", '4': "} (George Edward Alexander Edmund; 20 December 1902 – 25 August 1942) was the fourth son of George V of the United Kingdom and Queen Mary.
Document 14: 1952 Mount Gannett C-124 crash: The 1952 Mount Gannett C-124 crash was an accident in which a United States Air Force Douglas C-124 Globemaster II military transport aircraft crashed into Mount Gannett in the Chugach Mountains, Alaska, on November 22, 1952. All of the 52 people on board were killed.
Document 15: Little Baldon air crash: The Little Baldon air crash occurred on 6 July 1965 when a Handley Page Hastings C1A transport aircraft operated by No. 36 Squadron Royal Air Force, registration TG577, crashed into a field in Little Baldon, near Chiselhampton, Oxfordshire, shortly after taking off from RAF Abingdon. The flight was captained by Flt Lt John Akin. All 41 people aboard, including six crew, perished in the crash, making it the third worst air crash in the United Kingdom at the time.
ground_truth: Prince George, Duke of Kent