About: http://webisa.webdatacommons.org/449877682

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	Crystalline silica is a natural occurring component of soil, sand, granite and other minerals.
http://www.w3.org/ns/prov#wasQuotedFrom	masonrymagazine.com