About: http://webisa.webdatacommons.org/308584222

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	In the preferred embodiment, the materials from which the domed base 46 and central hub 48 are made are a rigid material such as rigid PVC for the central hub 48, and a flexible material such as flexible PVC for the domed base 46.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr