About: http://webisa.webdatacommons.org/192007578

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, activated carbon is not especially effective against oxides of sulfur, hydrogen sulfide, low molecular weight aldehydes, ammonia, and nitrogen oxide.???
http://www.w3.org/ns/prov#wasQuotedFrom	hackaday.com