Complex sentence: An early and unusual example of double casting was the 1925 silent film "Lady of the Night", in which two women were portrayed by Norma Shearer to spotlight their very different social classes, and nobody took any notice of their identical appearance.
Split into simpler sentences: An early and unusual example is the 1925 silent film "Lady of the Night". Two women are portrayed by Norma Shearer to spotlight their very different social classes; otherwise, nobody takes any notice of their identical appearance.