About: http://webisa.webdatacommons.org/441589011

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As discussed above, tar is especially difficult to remove once deposited on the surface of the teeth, gums, tongue, and the rest of the oral cavity.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com