About: http://webisa.webdatacommons.org/194178631

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	Materials such as steel and concrete are often used for this purpose.
http://www.w3.org/ns/prov#wasQuotedFrom	thegreenbook.com