<http://webisa.webdatacommons.org/66531827>	<http://www.w3.org/ns/prov#value>	"mercury and other compounds emitted into the air from electric power plants, which are the largest end-users of our coal." .
<http://webisa.webdatacommons.org/prov/49916369>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/66531827> .
<http://webisa.webdatacommons.org/66531827>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/66531827>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .