About: http://webisa.webdatacommons.org/391179402

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 and diamond are two different forms of carbon, we use graphite in pencils.
http://www.w3.org/ns/prov#wasQuotedFrom	authorstream.com