Oscar-nominated “Lincoln,” which depicts the political fight to pass the 13th Amendment abolishing slavery, played a role in Mississippi officially ratifying the amendment this month — a century and a half later.

The story opens, not surprisingly, in a movie theater.

Last November, Dr. Ranjan Batra, associate professor of neurobiology and anatomical sciences at the University of Mississippi Medical Center, saw the Steven Spielberg film and wondered afterward what happened when the states voted on ratification.

That night, Batra — a native of India who became a U.S. citizen in 2008 — went on the website, learning the rest of the story.

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