Complex sentence: Charles-Irénée Castel, abbé de Saint-Pierre (February 18,1658--April 29,1743), French writer, was born at the château de Saint-Pierre-Église near Cherbourg.
Split into simpler sentences: Charles-Irénée Castel, abbé de Saint-Pierre (February 18,1658--April 29,1743) was a French writer. He was born at the château de Saint-Pierre-Église near Cherbourg.