About: http://webisa.webdatacommons.org/266993189

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	In the three-dimensional case, for example, the problem is especially important in computer graphics, when it is desirable to find a line-of-sight through a set of rectangular boxes or windows in the course of creating video displays.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr