About: http://webisa.webdatacommons.org/175633107

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	Apparatus 11 and barrier structure 13 can be made of any sturdy material, such as concrete, construction foam, wood, or certain kinds of metal or plastic.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com