Complex sentence: Moravcsik, was a Hungarian professor of Greek philology and Byzantine history who, with R.J.H. Jenkins, produced the important Dumbarton Oaks translation of Constantine VII Porphyrogenitus' "De Administrando Imperio".
Split into simpler sentences: Moravcsik, was a Hungarian professor of Greek philology and Byzantine history. With R.J.H. Jenkins, he produced the important Dumbarton Oaks translation of Constantine VII Porphyrogenitus' "De Administrando Imperio".