Complex sentence: She also appeared in a 1990 documentary on Republic Pictures, the studio where she did the bulk of her work; her husband, Sloan Nibley, who wrote many of her films, died the same year.
Split into simpler sentences: She also appeared in a 1990 documentary on Republic Pictures, the studio where she did the bulk of her work. Her husband, Sloan Nibley, who wrote many of her films, died the same year.