I want to know the answer to the following question:
In what year was The Moulin Rouge opened?
All the background I'm provided with is that "In 1911, the dance hall Olympia Paris invented the grand staircase as a settling for its shows, competing with its great rival, the Folies Bergère, Its stars in the 1920s included the American singer and dancer Josephine Baker.". Is that enough to answer the question?
Answer: no