Complex sentence: Since 1988 he has also taught at the Documentary School "Zelig" in Bolzano, where his main teaching subjects are "History and critic of documentary film" and "Scientific documentary techniques".
Split into simpler sentences: Since 1988 he has also taught at the Documentary School "Zelig" in Bolzano. His main teaching subjects are "History and Critic of Documentary Film" and "Scientific Documentary Techniques".