<http://caligraph.org/ontology/Impact_crater_of_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_on_Earth> .
<http://caligraph.org/ontology/Impact_crater_of_North_America>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Impact_craters_of_North_America> .
<http://caligraph.org/ontology/Impact_crater_of_North_America>	<http://www.w3.org/2000/01/rdf-schema#label>	"Impact crater of North America" .
<http://caligraph.org/ontology/Impact_crater_of_North_America>	<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_of_Canada>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_of_North_America> .
<http://caligraph.org/ontology/Impact_crater_of_Mexico>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_of_North_America> .
<http://caligraph.org/ontology/Impact_crater_of_the_United_States>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Impact_crater_of_North_America> .
<http://caligraph.org/ontology/Impact_crater_of_North_America>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_impact_craters_in_North_America> .