 
 <prompt> ```which artist be the fourth wey dem mention? Based on the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context:``` <response>: The term Cubism no dey common until 1911, mainly with reference to Metzinger, Gleizes, Delaunay, and Léger. For 1911, di poet and critic Guillaume Apollinaire accept di term on top of a group of artists wey dem invite make dem exhibit for Brussels Indépendants. The following year, as dem dey prepare for the Salon de la Section d'Or, Metzinger and Gleizes write and publish Du "Cubisme" to clear the confusion wey dey around the word, and as a major defence of Cubism (wey cause public scandal after the 1911 Salon des Indépendants and the 1912 Salon d'Automne for Paris). Clarifying their aims as artists, dis work na di first theoretical treatise on Cubism and e still remain the clearest and most intelligible. The result, wey no be only collaboration between di two authors, reflect discussions by the circle of artists wey dey meet for Puteaux and Courbevoie. E mirror the attitudes of the "artists of Passy", wey include Picabia and the Duchamp brothers, wey sections of am dey read before dem publish am. The concept wey develop for Du "Cubisme" of observing a subject from different points in space and time simultaneously, i.e., the act of moving around an object to seize am from several successive angles fused into a single image (multiple viewpoints, mobile perspective, simultaneity or multiplicity), na device wey the Cubists dey use wey everybody don recognize. 