About: http://webisa.webdatacommons.org/299491112

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	Mechanical valves are made of man-made materials such as plastic, carbon or metal.
http://www.w3.org/ns/prov#wasQuotedFrom	ohsu.edu