About: http://webisa.webdatacommons.org/257500616

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	Second, in the environment of the mouth plastic orthodontic brackets tend to rapidly discolor due to stains caused by various foods, tobacco, beverages such as tea and coffee, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk