About: http://webisa.webdatacommons.org/122958335

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	Over time, particles from tobacco, foods, drinks such as wine and coffee, and other chemicals can penetrate these pores and stain the dentine layer.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com