About: http://webisa.webdatacommons.org/62050138

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	The presence of contaminants such as carbon and inorganic ions decreases the toxicity of crystalline silica.
http://www.w3.org/ns/prov#wasQuotedFrom	ec.gc.ca