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<http://webisa.webdatacommons.org/116429638>	<http://www.w3.org/ns/prov#value>	"Substances tracked in on footwear may carry toxic chemicals such as pesticides, organic pollutants, and heavy metals." .
<http://webisa.webdatacommons.org/prov/409610152>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/116429638> .
<http://webisa.webdatacommons.org/116429638>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<preventcancernow.ca> .