<http://webisa.webdatacommons.org/74832052>	<http://www.w3.org/ns/prov#value>	"Sand mined in the Midwest is used in places such as North Dakota and Pennsylvania to tap oil and gas reserves." .
<http://webisa.webdatacommons.org/prov/68549013>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/74832052> .
<http://webisa.webdatacommons.org/prov/117003997>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/74832052> .
<http://webisa.webdatacommons.org/74832052>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<blogspot.com> .
<http://webisa.webdatacommons.org/74832052>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .