Complex sentence: Andrewes was a Fellow of Pembroke College, Oxford (1933-46) and of New College, Oxford (1946-53) and was Wykeham Professor of Ancient History from 1953 until his retirement in 1977.
Split into simpler sentences: Andrewes was a Fellow of Pembroke College, Oxford between 1933 and 1946, and of New College, Oxford from 1946 to 1953. He was Wykeham Professor of Ancient History from 1953 until his retirement in 1977.