<http://caligraph.org/ontology/Submarine_pipeline>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Pipeline> .
<http://caligraph.org/ontology/Pipeline_under_the_Baltic_Sea>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Submarine_pipeline> .
<http://caligraph.org/ontology/Submarine_pipeline>	<http://www.w3.org/2000/01/rdf-schema#label>	"Submarine pipeline" .
<http://caligraph.org/ontology/Submarine_pipeline>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Submarine_pipeline>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Submarine_pipelines> .
<http://caligraph.org/ontology/Pipeline_under_the_Black_Sea>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Submarine_pipeline> .
<http://caligraph.org/ontology/Pipeline_under_the_Mediterranean_Sea>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Submarine_pipeline> .
<http://caligraph.org/ontology/Pipeline_under_the_North_Sea>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Submarine_pipeline> .