Complex sentence: He was a student at the University of Göttingen, where one of his instructors was Johann Gottfried Eichhorn (1852-1827), then continued his studies in Vienna with Orientalist Joseph von Hammer-Purgstall (1774-1856).
Split into simpler sentences: He was a student at the University of Göttingen, where one of his instructors was Johann Gottfried Eichhorn (1852-1827). He then continued his studies in Vienna with Orientalist Joseph von Hammer-Purgstall (1774-1856).