About: http://webisa.webdatacommons.org/5742811

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	In wells which produce some sand and other foreign matter it is not desirable to let these fluids enter the control system, that is mix with and contaminate the control uid.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk