About: http://webisa.webdatacommons.org/323555068

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 common compound that is found in a number of materials such as sandstone, marble, flint, slate, soil, mortar, plaster and sand.
http://www.w3.org/ns/prov#wasQuotedFrom	pneumoconiosis.org.uk