About: http://webisa.webdatacommons.org/8964561

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	Crown glass (optics) Crown glass is type of optical glass used in lenses and other optical components.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net