About: http://webisa.webdatacommons.org/79079472

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	Abrasives such as alumina, silicon carbide (SiC), boron carbide, diamond and other materials harder than the GaN (or other Group III-V nitride involved) may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com