<http://webisa.webdatacommons.org/377090976>	<http://www.w3.org/ns/prov#value>	"During a drilling operation, characteristics such as density and porosity of the formation may change over time." .
<http://webisa.webdatacommons.org/377090976>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/377090976>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/prov/124731255>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/377090976> .