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<http://webisa.webdatacommons.org/prov/271417243>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/377524287> .
<http://webisa.webdatacommons.org/377524287>	<http://www.w3.org/ns/prov#value>	"For decades, utilities have looked for commercial uses for coal ash, a byproduct of coal-fired electricity generation that includes poisons such as arsenic, lead and mercury." .
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