About: http://webisa.webdatacommons.org/168983731

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	(10) Silica is a naturally occurring mineral and is the second most common constituent of the earth???s crust.
http://www.w3.org/ns/prov#wasQuotedFrom	alec.org