About: http://webisa.webdatacommons.org/403463407

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	However, the difficulty in maintaining the precision and reliability of the devices, particularly with regard to the zero reference, has made them of limited value in routine diagnosis and control of refiners.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es