About: http://webisa.webdatacommons.org/346590258

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	Of these iron, cobalt and ruthenium are preferred, particularly iron and cobalt, most particularly cobalt.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es