About: http://webisa.webdatacommons.org/215833234

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 gate may be essentially hollow and filled with air or other floatation material such as Styrofoam, decreasing the power needed to move the gate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr