<http://webisa.webdatacommons.org/169687015>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<cuny.edu> .
<http://webisa.webdatacommons.org/prov/127708194>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/169687015> .
<http://webisa.webdatacommons.org/169687015>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/169687015>	<http://www.w3.org/ns/prov#value>	"Metal ions such as lead, cadmium and copper are among the biggest contributors to water pollution and can leach into water from corroded plumbing, battery and paint discharges, glass and electronic production wastes and natural deposits." .