This is the relevant information: It was originally published in Vogue on December 6, 1894, as "The Dream of an Hour".
This justifies what answer for what question? Q & A:
Passage: "The Story of an Hour," is a short story written by Kate Chopin on April 19, 1894. It was originally published in Vogue on December 6, 1894, as "The Dream of an Hour". Later it was reprinted in St. Louis Life on January 5, 1895, as "The Story of an Hour".

Question: Based on this passage, when was the story of an hour published?
December 6 , 1894