<http://webisa.webdatacommons.org/prov/273407815>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/241408554> .
<http://webisa.webdatacommons.org/241408554>	<http://www.w3.org/ns/prov#value>	"However, for cost and other reasons, a benchmark concentration of about 40% may be used." .
<http://webisa.webdatacommons.org/241408554>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/304029157>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/241408554> .
<http://webisa.webdatacommons.org/241408554>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .