Original sentence: In the original Star Wars trilogy, Darth Vader is the primary antagonist: a dark, ruthless figure, out to capture, torture, or kill the films's heroes to prevent them from thwarting the Empire
Edited sentence: In the original Star Wars trilogy, Darth Vader is one of the primary antagonists: a dark, ruthless figure, out to capture, torture, or kill the films's heroes to prevent them from thwarting the Empire