Complex sentence: Sir William Heygate, 1st Baronet born 24 June 1782, died 28 Aug 1844 was a Baronet in the 19th century and served as Lord Mayor of London from 1822 to 1823.
Split into simpler sentences: Sir William Heygate, 1st Baronet was a Baronet in the 19th century. He served as Lord Mayor of London from 1822 to 1823.