Complex sentence: Iziaslav Yaroslavich (1024-3 October 1078), Kniaz' (Prince of Turov), Veliki Kniaz (the Grand Prince) of Kiev (since 1054), the oldest son of Yaroslav I the Wise from his second wife Ingigerd Olafsdottir.
Split into simpler sentences: Iziaslav Yaroslavich (1024-3 October 1078), Kniaz' (Prince of Turov), Veliki Kniaz (the Grand Prince) of Kiev (since 1054). Iziaslav was the oldest son of Yaroslav I the Wise from his second wife Ingigerd Olafsdottir.