Complex sentence: When the last of the Warennes John, the 8th Earl died without issue in 1347 he was buried in Lewes monastery and his title passed to his nephew Richard Fitzalan who was also Earl of Arundel.
Split into simpler sentences: When the last of the Warennes John, the 8th Earl died without issue in 1347, he was buried in Lewes monastery. His title passed to his nephew Richard Fitzalan who was also Earl of Arundel.