Complex sentence: He was educated at the Dragon School from 1912 to 1919, at Winchester College from 1919 to 1924 and at New College, Oxford, from 1924 to 1927, where he gained a first class degree in Philosophy, Politics and Economics in 1927.
Split into simpler sentences: He was educated at the Dragon School from 1912 to 1919, at Winchester College from 1919 to 1924 and at New College, Oxford, from 1924 to 1927. He graduated with a first class degree in Philosophy, Politics and Economics in 1927.