a wooden block is pushed across a sheet of sandpaper
sandpaper is bounded_surface. wallpaper is paper. wallpaper is covering_for_indoor_walls. sandpaper is physical_surface. sandpaper is not bounded_surface. sandpaper is not physical_surface. cardboard is pressed_wood_or_paper. wrapping_paper is covering. sandpaper is device. cardboard is not pressed_wood_or_paper.