Original sentence: It was nominated for four Academy Awards in the categories of: Best Actress in a Leading Role (Marlene Dietrich, who knew little English, and spoke her lines phonetically), Best Art Direction, Best Cinematography and Best Director (Josef von Sternberg)
Edited sentence: It was nominated for four Academy Awards in the categories of: Best Actress in a Leading Role (Marlene Dietrich—who, amazingly, knew little English, and spoke her lines phonetically), Best Art Direction, Best Cinematography and Best Director (Josef von Sternberg)