About: http://webisa.webdatacommons.org/440100407

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	The spherical substrate preferably consists of glass, but it can also be made of other materials such as metals or ceramics.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk