About: http://webisa.webdatacommons.org/201864319

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	graphite combined with iron or copper or of mixtures of two metals, such as tin and
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net