Complex sentence: The film begins with mad scientist Dr. Kurt Leopold in his lab where he has lived alone for about twenty years, comtemplating how his former colleagues laughed at his formula (which he calls Zaat), which can turn a man into a walking catfish.
Split into simpler sentences: The film begins with mad scientist Dr. Kurt Leopold in his lab where he has lived alone for about twenty years. He is comtemplating how his former colleagues laughed at his formula (which he calls Zaat), which can turn a man into a walking catfish.