Question: Bertram Mackennal was a sculptor most famous for designing coins and what else featuring King George V of England?

full_context: Document 1: McKinley Birthplace Memorial dollar: The McKinley Birthplace Memorial dollar was a commemorative coin struck in gold by the United States Bureau of the Mint in 1916 and 1917, depicting the 25th President of the United States, William McKinley. The coin's obverse was designed by Mint Chief Engraver Charles E. Barber, and the reverse by his assistant, George T. Morgan. As McKinley had appeared on a version of the 1903-dated Louisiana Purchase Exposition dollar, the 1916 release made him the first person to appear on two issues of U.S. coins.
Document 2: George V of Hanover: George V (George Frederick Alexander Charles Ernest Augustus; German: "Georg Friedrich Alexander Karl Ernst August" ; 27 May 1819 – 12 June 1878) was the last king of Hanover, the only child and successor of King Ernest Augustus. George V's reign was ended by the Unification of Germany.
Document 3: 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 4: 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 5: London International Stamp Exhibition 1950: The London International Stamp Exhibition 1950 was held in the Great Room, Grosvenor House, Park Lane from 6-13 May 1950, under the chairmanship of Sir John Wilson, Keeper of the Royal Philatelic Collection. A non-postal souvenir sheet was produced by Waterlow and Sons for the event using the collotype process. It depicted the Penny Black; Nova Scotia 1851 1/-; New South Wales 1850 1d Sydney View; Ceylon 1859 4d; Cape of Good Hope 1853 4d triangular. A souvenir cover showing St. George and the dragon was also available
Document 6: 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 7: Charles Douglas Richardson: Charles Douglas Richardson (7 July 1853 – 15 October 1932) was one of the most gifted sculptors working in Australia at c. 1900. His contemporary Bertram Mackennal was a highly enterprising sculptor, who had a more business-like approach to promoting his work. Richardson's career was based in Australia from 1889 onwards, whereas Mackennal spent most of his working life outside of Australia.
Document 8: Bertram Mackennal: Sir Edgar Bertram Mackennal {'1': ", '2': ", '3': ", '4': "} (12 June 186310 October 1931), usually known as Bertram Mackennal, was an Australian sculptor, most famous for designing the coinage and stamps bearing the likeness of George V. He signed his work "BM".
Document 9: Norman Lindsay: Norman Alfred William Lindsay (22 February 1879 – 21 November 1969) was an Australian artist, etcher, sculptor, writer, editorial cartoonist, scale modeller, and an accomplished amateur boxer.
Document 10: 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 11: 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 12: List of Prime Ministers of King George V: King George V was the monarch of the United Kingdom and the British Empire and its successor from 6 May 1910 until his death on 20 January 1936.
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: 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 15: Aes signatum: Asses signata (Latin, "stamped bronze", singular aes signatum) consisted of cast lumps of bronze of measured quality and weight, embossed with a government stamp, used as currency in Rome and central Italy before the introduction of the aes grave in the mid 4th century BC. When exactly they were first made is uncertain. Popular tradition ascribes them to Servius Tullius, but due to the high quality of art found on even the earliest specimens, this seems very unlikely. A date in the midst of the 5th century BC is generally agreed on. Designs featured are that of a bull, an eagle, and other religious symbols.
ground_truth: stamps