sentence: Flash (Steve Holland), Dale Arden (Irene Champlin) and Dr. Zarkov (Joseph Nash) are agents of the Galactic Bureau of Investigation.
modified: Flashes (Steves Hollnads), Dales Ardens (Irenes Champlins) and Dr.s Zarkovs (Josephs Nashes) is agent of the Galactics Bureaux of Investigations.