About: http://webisa.webdatacommons.org/30506654

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	??? Boilers at large sources of air toxics emissions: There are about 13,800 boilers located at large sources of air pollutants, including refineries, chemical plants, and other industrial facilities.
http://www.w3.org/ns/prov#wasQuotedFrom	epa.gov