Complex sentence: In the following year he reached an agreement with his cousins, the three sons of the late Béla I. Géza, Ladislaus and Lampert acknowledged Solomon's rule, but in exchange received one-third of the kingdom as a separate duchy.
Split into simpler sentences: In the following year he reached an agreement with the three sons of the late Béla IGéza, Ladislaus and Lampert. They acknowledged Solomon's rule, but in exchange Lampert received one-third of the kingdom as a separate duchy.