<http://caligraph.org/ontology/October_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_Mexico>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/January_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/July_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#label>	"1972 event in North America" .
<http://caligraph.org/ontology/June_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/December_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event> .
<http://caligraph.org/ontology/August_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_North_America>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1972_events_in_the_United_States_by_month> .
<http://caligraph.org/ontology/May_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_North_America>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1972_events_in_North_America_by_month> .
<http://caligraph.org/ontology/February_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/March_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_Canada>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Event_in_North_America> .
<http://caligraph.org/ontology/November_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/1972_event_in_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/April_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .
<http://caligraph.org/ontology/September_1972_event_in_North_America>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1972_event_in_North_America> .