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<http://webisa.webdatacommons.org/prov/241530781>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/6485120> .
<http://webisa.webdatacommons.org/6485120>	<http://www.w3.org/ns/prov#value>	"Any one of a variety of activated carbon filter formulations and constructions, including the use of protective microporous membranes, can be considered appropriate for use in this regard." .
<http://webisa.webdatacommons.org/6485120>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .