Complex sentence: The 1946 film version, starring Alastair Sim and Trevor Howard, with Sally Gray and Rosamund John, was directed by Sidney Gilliat and is generally regarded by film historians as one of the greatest screen adaptations of a Golden Age mystery novel.
Split into simpler sentences: The 1946 film version, starring Alastair Sim and Trevor Howard, with Sally Gray and Rosamund John. It was directed by Sidney Gilliat and is regarded by film historians as one of the greatest screen adaptations of a Golden Age mystery novel.