Complex sentence: Sancho (,; died 1223), Count of Cerdanya (c.1175--89), Provence (1181--85) and Roussillon (1208--12), was the youngest son of Count Raymond Berengar IV of Barcelona and Queen Petronilla of Aragon.
Split into simpler sentences: Sancho (,; died 1223) was the Count of Cerdanya (c.1175--89), Provence (1181--85) and Roussillon (1208--12). He was the youngest son of Count Raymond Berengar IV of Barcelona and Queen Petronilla of Aragon.