<http://webisa.webdatacommons.org/194376564>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<purdue.edu> .
<http://webisa.webdatacommons.org/prov/94709225>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/194376564> .
<http://webisa.webdatacommons.org/194376564>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/194376564>	<http://www.w3.org/ns/prov#value>	"Some heavy metals, such as copper and zinc, are required for normal metabolic function while others, including cadmium and lead, are toxic." .
<http://webisa.webdatacommons.org/prov/122776853>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/194376564> .