About: http://webisa.webdatacommons.org/435883626

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	The prismatic reflective element 16 may be formed from various materials such as plastic or glass, but preferably is glass, and preferably has a planar front surface 16 a extending at an angle to a planar rear surface 16 b (FIG. 3).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com