sharpening a pencil changes the shape of the pencil
lead_pencil is pencil. slate_pencil is pencil. wooden_pencil is pencil. after_pencil has been_sharpened_pencil_shorter pencil_sharpener has blade coloured_pencil is pencil. pencil is figure. pencil_sharpener is sharpener. colored_pencil is pencil. pencil_sharpener is device_to_sharpen_pencils.