<http://caligraph.org/ontology/Impact_event>	<http://www.w3.org/2000/01/rdf-schema#label>	"Impact event" .
<http://caligraph.org/ontology/Mars_impact_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_event> .
<http://caligraph.org/ontology/Impact_event>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Modern_Earth_impact_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_event> .
<http://caligraph.org/ontology/Hypothetical_impact_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_event> .
<http://caligraph.org/ontology/Impact_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Astronomical_event> .
<http://caligraph.org/ontology/Impact_event_in_fiction>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_event> .
<http://caligraph.org/ontology/Impact_event>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Impact_events> .
<http://caligraph.org/ontology/Potential_impact_event_caused_by_near-Earth_objects>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_event> .