Task: Text Categorization
Input (English): One work by this artist shows a disembodied man take off his hat to reveal another one beneath it, Hat in the Hand, Hat on the Head. Drawing from Francis Picabia, he created the absurdly-titled Gramineous Bicycle Garnished with Bells the Dappled Fire Damps and the Echinoderms Bending the Spine to Look for Caresses in the collage genre. He often used dead birds in his paintings because his sister was born the same day a pet bird of his died, as recounted in his memoir, Views. Sculptured heads are placed on living bodies in his The Rendezvous of Friends, while a headless female nude extends her arm towards a semi-mechanical animal in Elephant Celebes. Also remembered for painting Two Children Are Threatened by a Nightingale, his Europe after the Rain makes use of a technique he discovered by tracing out paper on floorboard. FTP, name this German Surrealist who invented the frottage technique of painting.
Output (English): Fine Arts