About: http://webisa.webdatacommons.org/402577620

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	Another use of hollow spheres of the invention is in building materials such as poured concrete or preformed concrete or slabs.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca