Complex sentence: As Vicar General, he takes care of the diocese of Rome on behalf of the pope, as well as being Archpriest of the Lateran Basilica and Grand Chancellor of the Pontifical Lateran University.
Split into simpler sentences: As Vicar General, he is responsible for the diocese of Rome on behalf of the pope. He is also Archpriest of the Lateran Basilica and Grand Chancellor of the Pontifical Lateran University.