<http://webisa.webdatacommons.org/prov/409485979>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/179437297> .
<http://webisa.webdatacommons.org/179437297>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/410796367>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/179437297> .
<http://webisa.webdatacommons.org/179437297>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<sciencedaily.com> .
<http://webisa.webdatacommons.org/179437297>	<http://www.w3.org/ns/prov#value>	"Current EPA guidance for sampling residential plots for lead recommends analyzing as few as two composite samples to ensure that the plot is safe for activities such as gardening or children's play." .