<http://caligraph.org/ontology/1st-millennium_BC_earthquake>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_natural_disaster> .
<http://caligraph.org/ontology/Ancient_natural_disaster>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/2nd-century_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_natural_disaster> .
<http://caligraph.org/ontology/1st-century_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_natural_disaster> .
<http://caligraph.org/ontology/Ancient_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_disaster> .
<http://caligraph.org/ontology/1st-century_BC_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_natural_disaster> .
<http://caligraph.org/ontology/4th-century_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_natural_disaster> .
<http://caligraph.org/ontology/3rd-century_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ancient_natural_disaster> .
<http://caligraph.org/ontology/Ancient_natural_disaster>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Ancient_natural_disasters> .
<http://caligraph.org/ontology/Ancient_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#label>	"Ancient natural disaster" .
<http://caligraph.org/ontology/Ancient_natural_disaster>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Natural_disaster> .