About: http://webisa.webdatacommons.org/289160251

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	A preferable amount of the light-shielding material is therefore in a range of 0.5 to 7% by weight except for the case of unstretched films or flexible sheets such as paper.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com