About: http://webisa.webdatacommons.org/401974905

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	This could be done using a rotating mirror or other optical apparatus, using multiple lasers (which are inexpensive), or by affixing a laser to a mechanically steered camera as described previously.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au