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<http://webisa.webdatacommons.org/prov/296711893>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/8644065> .
<http://webisa.webdatacommons.org/8644065>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<marketplace.org> .
<http://webisa.webdatacommons.org/8644065>	<http://www.w3.org/ns/prov#value>	"The Clean Air Act indirectly affects coal mining operations by extensively regulating the air emissions of sulfur dioxide, nitrogen oxide, mercury and other compounds emitted by coal-based electricity generating plants." .
<http://webisa.webdatacommons.org/8644065>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .