Complex sentence: Immediately after the disastrous defeat at the hands of the Byzantines in the battle of Kleidion, his soldiers were blinded by order of the Byzantine emperor Basil II. Emperor Samuel sought refuge in Prespa, where he died of a heart attack on 6 October 1014.
Split into simpler sentences: Immediately after the disastrous defeat at the hands of the Byzantines in the battle of Kleidion, emperor Samuel sought refuge in Prespa. There he met his soldiers, blinded by the Byzantine emperor Basil II, and died of a heart attack on 6 October 1014.