About: http://webisa.webdatacommons.org/165612867

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	it is not that unusual, either, but the Clean Air Act and other environmental regulations has helped in this respect, and it is certainly not as bad as used to be.
http://www.w3.org/ns/prov#wasQuotedFrom	straightdope.com