<http://caligraph.org/ontology/Vacuum_tube>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Vacuum_tube>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://www.w3.org/2002/07/owl#Thing> .
<http://caligraph.org/ontology/Vacuum_tube>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_vacuum_tubes> .
<http://caligraph.org/ontology/Vacuum_tube>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Vacuum_tubes> .
<http://caligraph.org/ontology/Gas-filled_tube>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Vacuum_tube> .
<http://caligraph.org/ontology/Guitar_amplification_tube>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Vacuum_tube> .
<http://caligraph.org/ontology/Vacuum_tube>	<http://www.w3.org/2000/01/rdf-schema#label>	"Vacuum tube" .