<http://webisa.webdatacommons.org/30834297>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/385851946>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/30834297> .
<http://webisa.webdatacommons.org/prov/480474451>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/30834297> .
<http://webisa.webdatacommons.org/30834297>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<gvsu.edu> .
<http://webisa.webdatacommons.org/30834297>	<http://www.w3.org/ns/prov#value>	"No single factor alone indicates good water quality, and the quality varies with factors such as season and location." .