About: http://webisa.webdatacommons.org/76083501

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	BACKGROUND OF THE INVENTION [0003] The presence of sand, silt, clay and other foreign particles in fluid, such as water pumped from deep wells, greatly accelerates pump wear.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com