Complex sentence: This film has the distinction of being the only W. C. Fields film with a score by Richard Rodgers and Lorenz Hart and the only in which he costarred with Bing Crosby.
Split into simpler sentences: This film has the distinction of being the only W. C. Fields film with a score by Richard Rodgers and Lorenz Hart. Also, it is the only film in which he costarred with Bing Crosby.