About: http://webisa.webdatacommons.org/135523790

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 combustion catalysts are, for example, oxides of heavy metals such as lead and copper and organic or inorganic salts of the heavy metals.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com