<http://webisa.webdatacommons.org/87192346>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<walpa.org> .
<http://webisa.webdatacommons.org/87192346>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/489170897>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/87192346> .
<http://webisa.webdatacommons.org/87192346>	<http://www.w3.org/ns/prov#value>	"Microscopic analysis of water samples collected from lakes, streams and other bodies determines the diversity and density of algal species and provides potentially useful early warning signs of deteriorating conditions." .