About: http://webisa.webdatacommons.org/9268980

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	In one embodiment, rotation about the vertical and horizontal axes is controlled directly by actuators, e.g. electric motors or hydraulic systems.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com