About: http://webisa.webdatacommons.org/138681368

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 angle is a vector, and I am not really sure that rotating the system around it will do what I want.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com