About: http://webisa.webdatacommons.org/400945165

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 presentation angle, i.e. the angle at which the control sphere is presented to the user for actuating contact, is defined as the angle at which the z-coordinate axis is inclined from horizontal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com