About: http://webisa.webdatacommons.org/431570570

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	For instance, the slip free ring can be made from various materials including silicon, silicon carbide, graphite, silicon carbide coated graphite, quartz, besides various other materials.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com