<http://caligraph.org/ontology/Sirena-class_submarine>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Sirena-class_submarine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Italian_600_Series_submarine> .
<http://caligraph.org/ontology/Sirena-class_submarine>	<http://www.w3.org/2000/01/rdf-schema#label>	"Sirena-class submarine" .
<http://caligraph.org/ontology/Sirena-class_submarine>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Sirena-class_submarines> .