About: http://webisa.webdatacommons.org/254839866

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	Cast iron was used to manufacture all types of objects (cooking pots, cannon balls, pipes, etc.).
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com