<http://caligraph.org/ontology/Rocket_engine_using_the_pressure-fed_cycle>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Rocket_engines_using_the_pressure-fed_cycle> .
<http://caligraph.org/ontology/Rocket_engine_using_the_pressure-fed_cycle>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Rocket_engine_using_the_pressure-fed_cycle>	<http://www.w3.org/2000/01/rdf-schema#label>	"Rocket engine using the pressure-fed cycle" .
<http://caligraph.org/ontology/Rocket_engine_using_the_pressure-fed_cycle>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Pressure-fed_rocket> .
<http://caligraph.org/ontology/Rocket_engine_using_the_pressure-fed_cycle>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Rocket_engine> .