About: http://webisa.webdatacommons.org/309560501

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	The term dirt as used herein broadly refers to any foreign matter to be be removed such as grit, sand, etc., as well as film.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es