About: http://webisa.webdatacommons.org/454110699

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	In the prior art, a light source, such as a filament or arc, is positioned with a condenser lens, such as an aspheric condenser, in front of the source with a spherical mirror behind it.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com