About: http://webisa.webdatacommons.org/277779293

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	Because particulate matter is a difficult pollutant to remove due to its size, the system must rely on forces such as an electric field to pull it out of the air stream.
http://www.w3.org/ns/prov#wasQuotedFrom	issuu.com