About: http://webisa.webdatacommons.org/198473890

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	Naturally occurring materials such as limestone or dolomite can be used but specially prepared materials have generally better performance.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk