About: http://webisa.webdatacommons.org/219166610

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	When the particulate activated carbon and activated carbon fibers are impregnated with chemicals such as an acid or base, a filter capable of trapping basic or acid impurities in the air can be obtained.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com