About: http://webisa.webdatacommons.org/94143046

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	The filter aids are described as diatomaceous silica, perlite, siliceous material, carbon and fiber matter, such as asbestos and cellulose.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com