Complex sentence: The Gothic chapel contains four tombs, each supreme examples of contemporary sepulchral art, Young (1979), 82 and each from the Urgel family of Catalonia; counts, their wives and children, each with a commemorative tombstone sculptural effigy.
Split into simpler sentences: The Gothic chapel contains four tombs, each supreme examples of contemporary sepulchral art, Young (1979), 82 and each from the Urgel family of Catalonia. They were built for counts, their wives and children, each with a commemorative tombstone sculptural effigy.