About: http://webisa.webdatacommons.org/444243352

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 six most important primary air pollutants are sulfur, dioxide, nitrogen oxides, toxic elements such as lead and fluorine, a wide variety of volatile organic compounds, carbon monoxide, and particulate matter.
http://www.w3.org/ns/prov#wasQuotedFrom	berkeley.edu