Apollinaire was a French poet who developed a casual, lyrical poetic style characterized by a blend of modern and traditional images and verse techniques. His poetry was marked by daring technical experiments, and his use of unusual verbal associations and word patterns to create surprise is often considered the start of Surrealism. A friend of many avant-garde artists, including Pablo Picasso, Apollinaire was once arrested as a suspect in the theft of what famous painting? Discuss