About: http://webisa.webdatacommons.org/134841909

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 blocking device 36 may include a pre-formed and pre-shaped block of plastic, metal, wood or other material, provided that the blocking device does not permanently bond or adhere to the substrate 22 or the outer cover 16.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com