<http://webisa.webdatacommons.org/prov/461457811>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/7891245> .
<http://webisa.webdatacommons.org/7891245>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/7891245>	<http://www.w3.org/ns/prov#value>	"Chemicals, such as coal, chalk dust, or talcum powder" .
<http://webisa.webdatacommons.org/7891245>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wellspan.org> .