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<http://webisa.webdatacommons.org/prov/381573727>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/329480022> .
<http://webisa.webdatacommons.org/329480022>	<http://www.w3.org/ns/prov#value>	"drilling and production equipment and services, environmental risks, drilling and other operating risks, regulatory changes, the" .
<http://webisa.webdatacommons.org/prov/178878233>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/329480022> .