I want to know the answer to the following question:
In what year did Rosenberg exhibit Cubist works at  Galerie de l’Effort Moderne?
All the background I'm provided with is that "Attempts were made by Louis Vauxcelles to claim that Cubism was dead, but these exhibitions, along with a well-organized Cubist show at the 1920 Salon des Indépendants and a revival of the Salon de la Section d’Or in the same year, demonstrated it was still alive.". Is that enough to answer the question?