Complex sentence: Catherine Petrovna Rostopchin (1776--14 September 1859) was a Russian aristocrat, writer and the wife of Feodor Rostopchin, who served as governor of Moscow during the French Invasion of Russia.
Split into simpler sentences: Catherine Petrovna Rostopchin (1776--14 September 1859) was a Russian aristocrat and writer. She was married to Feodor Rostopchin, who served as governor of Moscow during the French Invasion of Russia.