| http://www.w3.org/ns/prov#value | - The front end 16 of the device is placed sequentially at various locations across his or her tongue, certainly including the farthest back in the mouth and toward the base of the tongue that one can reach, and at each location the device is then pulled toward the lips, thereby scraping over the surface of the tongue so that the plaque is dislodged from the tongue surface and accumulated inside the
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