<http://webisa.webdatacommons.org/107935664>	<http://www.w3.org/ns/prov#value>	"Coal contains arsenic, boron, and heavy metals such as lead, chromium, cadmium, and mercury (see summary contaminants in coal in Gottlieb et al. 2010)." .
<http://webisa.webdatacommons.org/107935664>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<coaltrainfacts.org> .
<http://webisa.webdatacommons.org/prov/85233327>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/107935664> .
<http://webisa.webdatacommons.org/107935664>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .