Complex sentence: After a two-years fellwoship at the Lawrence Berkeley Laboratory (Berkeley, CA, USA) under the supervision of Cornelius A. Tobias, he went back to Germany with the idea of using high-energy carbon ions to cure cancer.
Split into simpler sentences: After a two-years fellwoship at the Lawrence Berkeley Laboratory (Berkeley, CA, USA) under the supervision of Cornelius A. Tobias. He went back to Germany with the idea of using high-energy carbon ions to cure cancer.