About: http://webisa.webdatacommons.org/239389185

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	An inert, rounded gravel is the best choice; sub-rounded will do; sub-angular at a push, but try to avoid angular gravels as they, too, have a relatively low void space percentage.
http://www.w3.org/ns/prov#wasQuotedFrom	pavingexpert.com