Complex sentence: Nolan portrayed FBI agent Briggs, and actual FBI employees interacted with Nolan throughout the film; he reprized the role in a subsequent 1948 movie, "The Street with No Name".
Split into simpler sentences: Nolan portrayed FBI agent Briggs, and actual FBI employees interacted with Nolan throughout the film. He reprised the role in a subsequent 1948 movie, "The Street with No Name".