About: http://webisa.webdatacommons.org/394844796

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	Heavy metals such as lead and lead compounds, while imparting radiopacity, are toxic and hence undesirable for any prolonged contact with tissues or bloodstream.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca