Complex sentence: On the night of Mrs. Balicki's disappearance, Nazi Stormtroopers had broken into the house and taken her away, only for Edek to fire shots at the van in a bid to stop them from getting away.
Split into simpler sentences: On the night of Mrs. Balicki's disappearance, Nazi Stormtroopers had broken into the house and taken her away. Edek had fired shots at the retreating van in a bid to stop them from getting away.