Complex sentence: Their nemesis, police lieutenant Roscoe (Norman Burton), also learns of the race, and most of the film is thus devoted to the adventures of the various driving teams and Roscoe's ineffectual attempts to apprehend them.
Split into simpler sentences: Their nemesis, police lieutenant Roscoe (Norman Burton), also learns of the race. Most of the film is thus devoted to the adventures of the various driving teams and Roscoe's ineffectual attempts to apprehend them.