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<http://caligraph.org/ontology/Coal_mining_disaster_in_Oklahoma>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_Colorado>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_Utah>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_New_Mexico>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
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<http://caligraph.org/ontology/Coal_mining_disaster_in_Ohio>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_Pennsylvania>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States>	<http://www.w3.org/2000/01/rdf-schema#label>	"Coal mining disaster in the United States" .
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<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_North_America> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_Illinois>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
<http://caligraph.org/ontology/Coal_mining_disaster_in_Kentucky>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Coal_mining_disaster_in_the_United_States> .
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