<http://caligraph.org/ontology/Energy_company_established_in_1920>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Energy_company> .
<http://caligraph.org/ontology/Public_utility_established_in_1920>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Energy_company_established_in_1920> .
<http://caligraph.org/ontology/Energy_company_established_in_1920>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/RestrictionHasValue_foundingYear_1920> .
<http://caligraph.org/ontology/Energy_company_established_in_1920>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Energy_company_established_in_1920>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Energy_companies_established_in_1920> .
<http://caligraph.org/ontology/Energy_company_established_in_1920>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Energy_company_established_in_the_1920s> .
<http://caligraph.org/ontology/Energy_company_established_in_1920>	<http://www.w3.org/2000/01/rdf-schema#label>	"Energy company established in 1920" .