About: http://webisa.webdatacommons.org/251062554

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	Optical source 26 may comprise a lamp or bulb, such as a halogen bulb, to produce light or optical signals; however, other suitable methods or devices may be used to generate optical signals.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com