About: http://webisa.webdatacommons.org/140191608

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	Until the development of steel, iron was a primary building material throughout the world, for everything from skyscrapers to steam engine components.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.com