About: http://webisa.webdatacommons.org/91376239

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 then there was no Iron or Gold or other elements on the periodic table other than the first few.
http://www.w3.org/ns/prov#wasQuotedFrom	waitbutwhy.com