<http://webisa.webdatacommons.org/172089639>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/410658581>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/172089639> .
<http://webisa.webdatacommons.org/172089639>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<virginia.gov> .
<http://webisa.webdatacommons.org/172089639>	<http://www.w3.org/ns/prov#value>	"Through the use of field mapping and specialized investigative techniques, geologists discover and develop such resources as petroleum, iron ore, copper, limestone, and sulfur." .