Complex sentence: Maximilien François Marie Isidore de Robespierre (6 May 1758--28 July 1794) was a French lawyer and politician, one of the best known and most influential figures associated with the French Revolution and the Reign of Terror.
Split into simpler sentences: Maximilien François Marie Isidore de Robespierre (6 May 1758--28 July 1794) was a French lawyer and politician. He was one of the best-known and most influential figures associated with the French Revolution and the Reign of Terror.