Complex sentence: Rosemary (Joy Glaccum) and her new boyfriend Roy (Timothy Wahrer) leave the party and are murdered by a mysterious prowler in combat uniform who impales them on a pitchfork.
Split into simpler sentences: Rosemary (Joy Glaccum) is attending with her new boyfriend Roy (Timothy Wahrer). After they leave the party they a murdered by a mysterious prowler in combat uniform who impales them on a pitchfork.