Premise: Charles, Prince of Wales . Charles was born at Buckingham Palace as the first grandchild of King George VI and Queen Elizabeth . 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: Charles, Prince of Wales was the first grandchild of at least one wife of King George VI in 1939.
Label: ENTAILMENT