About: http://webisa.webdatacommons.org/450572048

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	Materials other than glass could be used provided that such materials transmit radiation such as ultraviolet light and have a low coefficient of thermal expansion.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com