<http://webisa.webdatacommons.org/prov/449027793>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/191142559> .
<http://webisa.webdatacommons.org/191142559>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/191142559>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<gresham.ac.uk> .
<http://webisa.webdatacommons.org/191142559>	<http://www.w3.org/ns/prov#value>	"Elements such as copper, mercury, cadmium and zinc are key potential pollutants from industry (and other activities) that can have toxic effects on organisms." .