About: http://webisa.webdatacommons.org/30993802

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	For example, radiation 20 may be directed directly through an emission source using appropriate optics (e. g., lenses, mirrors, beam splitters, polarizers, filters, retro-reflectors and other optics).
http://www.w3.org/ns/prov#wasQuotedFrom	sumobrain.com