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Keywords:CCHS, Composite, abstract, advertisement, advertising, architecture, background, banner, billboard, blank, board, bright, building, business, ceiling, city, commercial, corridor, design, empty, facebook posts, floor, fluorescent, frame, gallery, hall, hallway, indoor, inside, interior, life, light, modern, nobody, office, panel, passage, perspective, placard, post, quiet, road, signboard, silence, stair, staircase, tunnel, underground, walkway, wall, way
