About: http://webisa.webdatacommons.org/441636942

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	Use of such light emitting diode is not indispensable, and any other light source may be used provided that it produces light of the wavelength the same as or substantially the same as the wavelength used for the alignment purpose.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com