Complex sentence: Samuel Richardson (19 August 1689--4 July 1761) was a major 18th-century English writer best known for his three epistolary novels:'(1740),' (1748) and "Sir Charles Grandison" (1753).
Split into simpler sentences: Samuel Richardson (19 August 1689--4 July 1761) was a major 18th-century English writer. He is best known for his three epistolary novels:'(1740),' (1748) and "Sir Charles Grandison" (1753).