Complex sentence: A number of houses in Norham Gardens are now used by the University of Oxford (mainly the Department of Education) and its colleges; one is an ecumenical postgraduate student hostel run by the Society of the Sacred Heart.
Split into simpler sentences: A number of houses in Norham Gardens are now used by the University of Oxford (mainly the Department of Education) and its colleges. One house also contains an ecumenical postgraduate student hostel run by the Society of the Sacred Heart.