About: http://webisa.webdatacommons.org/354963428

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	Iron and other materials allowed construction of structures that were larger, stronger, and more
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com