About: http://webisa.webdatacommons.org/101184955

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 problem was especially acute in the Northeast, as a result of burning soft, high-sulfur Pennsylvania coal.
http://www.w3.org/ns/prov#wasQuotedFrom	literotica.com