About: http://webisa.webdatacommons.org/263262513

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	iridium, platinum, ruthenium, iridium oxide, platinum oxide, ruthenium oxide, or other suitable material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com