Complex sentence: He initially studied philology at the University of Bonn, where one of his instructors was Friedrich Wilhelm Ritschl (1806-1876), and afterwards studied history under Georg Waitz (1813-1886) at the University of Göttingen.
Split into simpler sentences: He initially studied philology at the University of Bonn, where one of his instructors was Friedrich Wilhelm Ritschl (1806-1876). Afterwards he studied history under Georg Waitz (1813-1886) at the University of Göttingen.