Premise: Elizabeth II ( Elizabeth Alexandra Mary ; born 21 April 1926 ) has been Queen of the United Kingdom , Canada , Australia , and New Zealand since 6 February 1952 . In 1947 , she married Philip , Duke of Edinburgh , a former prince of Greece and Denmark , with whom she has four children : Charles , Prince of Wales ; Anne , Princess Royal ; Prince Andrew , Duke of York ; and Prince Edward , Earl of Wessex . Moments of sadness for her include the death of her father in 1952 at age 56 ; the assassination of Prince Philip 's uncle Lord Mountbatten in 1979 ; the breakdown of her children 's marriages in 1992 ( her annus horribilis ) ; the death in 1997 of her son 's former wife , Diana , Princess of Wales ; and the deaths of her mother and sister in 2002 . 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 .
Hypothesis: Elizabeth II was murdered on 21 April 1926.
Label: CONTRADICTION