<http://webisa.webdatacommons.org/prov/53234572>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/94629073> .
<http://webisa.webdatacommons.org/94629073>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/94629073>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<usgs.gov> .
<http://webisa.webdatacommons.org/94629073>	<http://www.w3.org/ns/prov#value>	"The source of elevated chloride and the corresponding reductions in tree growth could not be explained by factors other than contamination." .