<http://caligraph.org/ontology/1930s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/2010s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#label>	"Aircraft piston engine" .
<http://caligraph.org/ontology/1940s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Air-cooled_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1970s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/CNA_aircraft_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1900s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Sauer_aircraft_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/V12_aircraft_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Aircraft_piston_engine>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Aircraft_piston_engines> .
<http://caligraph.org/ontology/Aircraft_diesel_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Aircraft_piston_engine>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Aircraft_piston_engines_by_decade> .
<http://caligraph.org/ontology/Aircraft_piston_engine>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/2000s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1920s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1950s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1910s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Radial_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Liquid-cooled_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1960s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1980s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/1990s_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .
<http://caligraph.org/ontology/Aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_engine> .
<http://caligraph.org/ontology/Aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Internal_combustion_piston_engine> .
<http://caligraph.org/ontology/Inverted_aircraft_piston_engine>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Aircraft_piston_engine> .