Complex sentence: Karl is working as Biegler's driver when the Night of the Long Knives occurs and Karl witnesses the execution of SA Chief Ernst Röhm, Biegler and other SA leaders.
Split into simpler sentences: Karl is working as Biegler's driver when the Night of the Long Knives occurs. Shown is the arrest and execution of SA Chief Ernst Röhm, Biegler and other SA leaders.