<http://webisa.webdatacommons.org/209908888>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/prov/3884113>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/209908888> .
<http://webisa.webdatacommons.org/209908888>	<http://www.w3.org/ns/prov#value>	"Trace elements such as lead, mercury, cadmium, zinc, cobalt and chromium" .
<http://webisa.webdatacommons.org/209908888>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .