<http://caligraph.org/ontology/Song_about_heroin>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Song_about_drugs> .
<http://caligraph.org/ontology/Song_about_drugs>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Songs_about_drugs> .
<http://caligraph.org/ontology/Song_about_cannabis>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Song_about_drugs> .
<http://caligraph.org/ontology/Song_about_drugs>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Song_about_social_issues> .
<http://caligraph.org/ontology/Song_about_drugs>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Work_about_drugs> .
<http://caligraph.org/ontology/Song_about_drugs>	<http://www.w3.org/2000/01/rdf-schema#label>	"Song about drugs" .
<http://caligraph.org/ontology/Song_about_alcohol>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Song_about_drugs> .
<http://caligraph.org/ontology/Song_about_cocaine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Song_about_drugs> .
<http://caligraph.org/ontology/Song_about_drugs>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Song_about_tobacco>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Song_about_drugs> .