Complex sentence: Starring Pierce Brosnan, Linda Hamilton, Charles Hallahan, Elizabeth Hoffman, Jamie Renée Smith, Jeremy Foley and Grant Heslov, the movie was set in the fictional town of Dante's Peak wherein the town must survive the volcano's eruption and its dangers.
Split into simpler sentences: Starring Pierce Brosnan, Linda Hamilton, Charles Hallahan, Elizabeth Hoffman, Jamie Renée Smith, Jeremy Foley, and Grant Heslov. The movie was set in the fictional town of Dante's Peak wherein the town must survive the volcano's eruption and its dangers.