<http://webisa.webdatacommons.org/207063948>	<http://www.w3.org/ns/prov#value>	"To produce one of the ceramic filters, all that is needed is some clay and material that is easily combustible, such as rice husks." .
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<http://webisa.webdatacommons.org/207063948>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<greenoptimistic.com> .
<http://webisa.webdatacommons.org/207063948>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .