Complex sentence: Johnson was hired after story editor John D. F. Black recommended him to the producers, and decided to use the 1953 science fiction novel "The Syndic" by Cyril M. Kornbluth as the basis for the story.
Split into simpler sentences: Johnson was hired after story editor John D. F. Black recommended him to the producers. Johnson decided to use the 1953 science fiction novel "The Syndic" by Cyril M. Kornbluth as the basis for the story.