About: http://webisa.webdatacommons.org/18065307

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	More particularly, the disks are preferably formed of a suitable rigid, non-corrosive material, such as stainless steel or Aluminum.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com