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 . She is the world 's oldest reigning monarch as well as Britain 's longest-lived . In 2017 she became the first British monarch to commemorate a Sapphire Jubilee . Queen Elizabeth The Queen Mother . She was Queen consort of the United Kingdom and the Dominions from her husband 's accession in 1936 until his death in 1952 , after which she was known as Queen Elizabeth The Queen Mother , to avoid confusion with her daughter .
Hypothesis: Elizabeth II is not the Queen of the United Kingdom.
Label: ENTAILMENT