Complex sentence: Gonzalo, king of Sobrarbe and Ribagorza, two small Pyrenean counties, from 1035 to his death in 1038, was the son of Sancho the Great, king of Navarre.
Split into simpler sentences: Gonzalo, king of Sobrarbe and Ribagorza, two small Pyrenean counties, from 1035 to his death in 1038. He was the son of Sancho the Great, king of Navarre.