Complex sentence: Lady Sarah Frances Elizabeth Chatto (née Armstrong-Jones; born 1 May 1964) is the only daughter of the 1st Earl of Snowdon and Princess Margaret, Countess of Snowdon, the second daughter of King George VI and Queen Elizabeth.
Split into simpler sentences: Lady Sarah Frances Elizabeth Chatto (née Armstrong-Jones; born 1 May 1964) is a membed of the British royal family. She is the only daughter of the 1st Earl of Snowdon and Princess Margaret, Countess of Snowdon, the second daughter of King George VI and Queen Elizabeth.