About: http://webisa.webdatacommons.org/200021337

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	However, the known arrangements suffer from the disadvantage of having a limited useful life before one or more of the layers, particularly the filter layers becomes blocked or obstructed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com