<http://webisa.webdatacommons.org/28428799>	<http://www.w3.org/ns/prov#value>	"removes contaminants, such as solids and particles, from sewage." .
<http://webisa.webdatacommons.org/28428799>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<ck12.org> .
<http://webisa.webdatacommons.org/prov/84069931>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/28428799> .
<http://webisa.webdatacommons.org/prov/207455339>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/28428799> .
<http://webisa.webdatacommons.org/28428799>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .