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What is the Harlem Renaissance?

The Harlem Renaissance was an intellectual, social, and artistic explosion centered in Harlem, Manhattan, New York City, spanning the 1920s. At the time, it was known as the "New Negro Movement", named after The New Negro, a 1925 anthology edited by Alain Locke.

it's a movie based on a real life event

Explanation:

it was a movement that was taken place in the 1920's

the audience knows that nora is intentionally failing to dance correctly, but helmer doesnt