<http://webisa.webdatacommons.org/238645539>	<http://www.w3.org/ns/prov#value>	"Ready mix concrete companies have massive piles of sand, gravel and other aggregates stockpiled on the grounds." .
<http://webisa.webdatacommons.org/238645539>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wisegeek.org> .
<http://webisa.webdatacommons.org/prov/424921159>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/238645539> .
<http://webisa.webdatacommons.org/238645539>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .