About: http://webisa.webdatacommons.org/300539474

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	An observation area is given in the three dimensional space, the contents such as a wall and a fixture are provided within the observation area, and the rays to be investigated are set (step 301).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com