<http://webisa.webdatacommons.org/340987388>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<preservearticles.com> .
<http://webisa.webdatacommons.org/prov/85233327>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/340987388> .
<http://webisa.webdatacommons.org/340987388>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/340987388>	<http://www.w3.org/ns/prov#value>	"Heavy metals such as lead, mercury, manganese, cadmium and chromium are generally toxic to life forms in grater than trace amounts." .