About: http://webisa.webdatacommons.org/14269467

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	Therefore, it is possible to employ two valve types in series, one to block leakage and the other to provide proportional control over flow.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es