Complex sentence: From 1952 to 1956 he attended the Eötvös Loránd University of Budapest and in 1957 he went to Zurich to study under Paul Karrer.
Split into simpler sentences: From 1952 to 1956 he attended the Eötvös Loránd University of Budapest. In 1957 he went to Zurich to study under Paul Karrer.