Complex sentence: The first main break in the Hollywood blacklist followed soon after: on January 20,1960, director Otto Preminger publicly announced that Dalton Trumbo, one of the best known members of the Hollywood Ten, was the screenwriter of his forthcoming film "Exodus".
Split into simpler sentences: The first main break in the Hollywood blacklist followed soon after. On January 20,1960, director Otto Preminger publicly announced that Dalton Trumbo, one of the best known members of the Hollywood Ten, was the screenwriter of his forthcoming film "Exodus".