About: http://webisa.webdatacommons.org/172887847

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	But I do not know how much iron oxides to use!?! you are probably thinking at this moment... and to be honest I can not tell you exactly, it is a sort of trial and error thing.
http://www.w3.org/ns/prov#wasQuotedFrom	craftster.org