Complex sentence: Remaining at Giessen, with the renowned Bernhard Stade as his supervisor, Schwally completed a PhD in Old Testament Studies in 1888 and published the thesis as a book in the same year.
Split into simpler sentences: Remaining at Giessen, with the renowned Bernhard Stade as his supervisor, Schwally completed a PhD in Old Testament Studies in 1888. He published the thesis as a book in the same year.