<http://caligraph.org/ontology/Impact_crater_on_planets>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Impact_crater_on_Venus>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_on_planets> .
<http://caligraph.org/ontology/Impact_crater_on_planets>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater> .
<http://caligraph.org/ontology/Impact_crater_on_Mars>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_on_planets> .
<http://caligraph.org/ontology/Impact_crater_on_planets>	<http://www.w3.org/2000/01/rdf-schema#label>	"Impact crater on planets" .
<http://caligraph.org/ontology/Impact_crater_on_Mercury>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_on_planets> .
<http://caligraph.org/ontology/Impact_crater_on_Earth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_on_planets> .
<http://caligraph.org/ontology/Impact_crater_on_planets>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Impact_craters_on_planets> .