About: http://webisa.webdatacommons.org/172991078

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	It is commonly made by combining materials such as silica, potash, and lead oxide
http://www.w3.org/ns/prov#wasQuotedFrom	buffaloah.com