Complex sentence: Soon after his succession, probably in 1058, Guiscard separated from his wife Alberada because they were related within the prohibited degrees, He quickly re-married Sichelgaita, the sister of Gisulf II of Salerno, Guaimar's successor.
Split into simpler sentences: Soon after his succession, probably in 1058, Guiscard separated from his wife Alberada because they were related within the prohibited degrees. Shortly after, he married Sichelgaita, the sister of Gisulf II of Salerno, Guaimar's successor.