About: http://webisa.webdatacommons.org/411168735

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	steps, such as bottom 46, lie either in a plane or on a cylindrical surface while the tops of the steps, such as top 48, lie along a parallel plane or cylindrical surface.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com