<http://caligraph.org/ontology/World_War_II_airfield>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Airfield> .
<http://caligraph.org/ontology/Airfield>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Architectural_structure> .
<http://caligraph.org/ontology/Airfield>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Airfields> .
<http://caligraph.org/ontology/Airfield_of_the_United_States_Army_Air_Corps>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Airfield> .
<http://caligraph.org/ontology/Royal_Flying_Corps_airfield>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Airfield> .
<http://caligraph.org/ontology/Airfield>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Model_airplane_field>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Airfield> .
<http://caligraph.org/ontology/Airfield>	<http://www.w3.org/2000/01/rdf-schema#label>	"Airfield" .