Complex sentence: Cesare Borgia, son of Pope Alexander VI, becomes the first person in history to resign the cardinalate; later that same day, King Louis XII of France names him Duke of Valentinois.
Split into simpler sentences: Cesare Borgia, son of Pope Alexander VI, becomes the first person in history to resign the cardinalate. On the same day, King Louis XII of France names him Duke of Valentinois.