About: http://webisa.webdatacommons.org/95868984

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	As explained on this page, the result of two reflections is a rotation.
http://www.w3.org/ns/prov#wasQuotedFrom	euclideanspace.com