<http://dbpedia.org/resource/Extraction_of_petroleum>	<http://dbpedia.org/ontology/thumbnail>	<http://commons.wikimedia.org/wiki/Special:FilePath/Oil_well.jpg?width=300> .
<http://dbpedia.org/resource/Extraction_of_petroleum>	<http://xmlns.com/foaf/0.1/depiction>	<http://commons.wikimedia.org/wiki/Special:FilePath/Oil_well.jpg> .
<http://dbpedia.org/resource/Extraction_of_petroleum>	<http://www.w3.org/2000/01/rdf-schema#comment>	"The extraction of petroleum  is the process by which usable petroleum is extracted and removed from the earth."@en .