About: http://webisa.webdatacommons.org/19905868

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	nd tilted with respect to the fourth surface R4, and the sixth surface R6 is a refracting surface which is shifted and tilted with respect to the fifth surface R5.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com