 
 <prompt> ```Who help start the idea of cubism with Gris? Given the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context:``` <response>: ```Di historical study of Cubism start for late 1920s, drawing from sources wey get limited data, wey be di opinions of Guillaume Apollinaire. E come dey rely heavily on Daniel-Henry Kahnweiler's book Der Weg zum Kubismus (wey dem publish for 1920), wey focus on di developments of Picasso, Braque, Léger, and Gris. Di terms "analytical" and "synthetic" wey come out later don dey widely accepted since mid-1930s. Both terms na historical impositions wey happen after di facts wey dem identify. Neither phase na so dem call am when di corresponding works dey created. "If Kahnweiler see Cubism as Picasso and Braque," Daniel Robbins write, "our only fault na say we dey subject other Cubists' works to di strictness of dat limited definition."``` 