<http://webisa.webdatacommons.org/prov/419122678>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/285231050> .
<http://webisa.webdatacommons.org/285231050>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/285231050>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<ntis.gov> .
<http://webisa.webdatacommons.org/285231050>	<http://www.w3.org/ns/prov#value>	"ance, later.) Each partner or shareholder must decide whether to use cost or percentage depletion." .