Complex sentence: Originally ordained as a Jesuit priest, he became Professor of Palaeontology at the Vatican's Pontifical Biblical Institute, and from 1958 Martin also served as a theological adviser to Cardinal Augustin Bea during preparations for the Second Vatican Council.
Split into simpler sentences: Originally ordained as a Jesuit priest, he became Professor of Palaeontology at the Vatican's Pontifical Biblical Institute. From 1958 he served as a theological adviser to Cardinal Bea during preparations for the Second Vatican Council.