About: http://webisa.webdatacommons.org/78382969

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	If desired, tube 65 could contain some optical elements such as lenses or the like to further focus and form the beam pattern, but this has not been found to be necessary.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com