Complex sentence: The stern later rose into the air exposing her screws causing her to roll over and sink in Bergen harbor 50 minutes after the initial attack The Königsberg fate was witnessed and reported by Americans aboard the Flying Fish also in harbor during the attack.
Split into simpler sentences: The stern later rose into the air exposing her screws, causing her to roll over and sink in Bergen harbor 50 minutes after the initial attack. The fate of the "Königsberg" was witnessed and reported by Americans aboard the "Flying Fish" also in harbor during the attack.