About: http://webisa.webdatacommons.org/175342692

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	Silica is a natural mineral present in large amounts in many construction materials like concrete roof tiles.
http://www.w3.org/ns/prov#wasQuotedFrom	hse.gov.uk