<http://webisa.webdatacommons.org/prov/392545512>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/13006136> .
<http://webisa.webdatacommons.org/13006136>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/13006136>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<worldwidescience.org> .
<http://webisa.webdatacommons.org/13006136>	<http://www.w3.org/ns/prov#value>	"Water samples were obtained from 150 sources including 72 wells, 60 streams, 17 taps, and one borehole, randomly selected from five residential areas in Jos, Nigeria." .