Complex sentence: Believing she is finally free, Anna jumps into the Vltava River naked, mistaking it for the Danube, and she and Ben climb a rooftop to watch an Offenbach opera being shown in a plaza.
Split into simpler sentences: Believing she is finally free, Anna jumps into the Vltava River naked, mistaking it for the Danube. Later, Anna and Ben climb a rooftop to watch an Offenbach opera being shown in a plaza.