About: http://webisa.webdatacommons.org/408476342

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	Such an agent might, in fact, be a metallic oxide, a metal salt, or other material which could be present as a distinct coating layer or, under proper conditions, could make an interdispersion bond to the glass itself.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com