About: http://webisa.webdatacommons.org/228861224

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	Its a good method for avoiding bad focus due to glass windows or other objects that makes false ???echoes??? for IR or sonar.
http://www.w3.org/ns/prov#wasQuotedFrom	hackaday.com