About: http://webisa.webdatacommons.org/431673799

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	Some additional activators which also may be used singly or in combination are the metal oxides, such as magnesium oxide, potassium oxide, sodium oxide, chromium oxide, barium oxide, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com