About: http://webisa.webdatacommons.org/345341939

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	Typically the metal casing of oil-well pipe 18 includes a ferrous metal, such as steel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com