<http://webisa.webdatacommons.org/214834625>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/214834625>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/412385550>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/214834625> .
<http://webisa.webdatacommons.org/214834625>	<http://www.w3.org/ns/prov#value>	"The efiicacy of such material is reduced as it becomes laden with the component or components that are being removed from the mixture, and therefore, conventionally it is regenerated periodically." .