About: http://webisa.webdatacommons.org/167436218

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	Lesser amounts of other potentially reactive elements are sometimes present, such as potassium, sulfur, lead, barium and copper.
http://www.w3.org/ns/prov#wasQuotedFrom	globalresearch.ca