Complex sentence: In the 1930 ´ s he lived at Vienna, Austria, teaching English and learning German witnessing the Austrian-German Union by Hitler in 1938, "Anschluss", predicting the Second world War while living there.
Split into simpler sentences: In the 1930s he lived in Vienna, Austria, teaching English and learning German. He witnessed the Austrian-German Union by Hitler in 1938, the Anschluss, predicting the Second world War while living there.