Complex sentence: In 1872, Konrad Duden, headmaster of a gymnasium (secondary school) in Schleiz (Thuringia), published a German dictionary called the "Schleizer Duden", the first Duden.
Split into simpler sentences: In 1872, Konrad Duden, headmaster of a gymnasium (secondary school) in Schleiz. Thuringia, published a German dictionary called the "Schleizer Duden", the first Duden.