About: http://webisa.webdatacommons.org/81519713

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	Although various materials such as wood, plastic, metal, etc., may be used as block material, plastic is preferred.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr