<http://webisa.webdatacommons.org/236181702>	<http://www.w3.org/ns/prov#value>	"Natural gas is a mixture of several gaseous components, the percentages of which may vary widely from one reservoir to another." .
<http://webisa.webdatacommons.org/prov/232019632>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/236181702> .
<http://webisa.webdatacommons.org/236181702>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/236181702>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .