Complex sentence: They realize the genius of the motor's creator and Dagny tracks down Dr. Hugh Akston, working as a cook at a diner; he understands whom Dagny is seeking and says she will never find him, though he may find her.
Split into simpler sentences: They realize the genius of the motor's creator and try to track him down. Akston knows whom Dagny is seeking and says she will never find him, though he may find her.