About: http://webisa.webdatacommons.org/301690173

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	Rails 16 and 18 are preferably formed from a rigid material, such as a polymeric material, including glass filled nylon, PVC, or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com