<http://caligraph.org/ontology/1828_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1827_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/November_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1820s_event>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1820_events_by_month> .
<http://caligraph.org/ontology/1826_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1825_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1820s_event>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/January_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1824_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/September_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1823_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1820s_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Event> .
<http://caligraph.org/ontology/August_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1822_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1820s_event>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1820s_events> .
<http://caligraph.org/ontology/June_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/February_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/May_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1820s_event>	<http://www.w3.org/2000/01/rdf-schema#label>	"1820s event" .
<http://caligraph.org/ontology/March_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1821_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/July_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/April_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/October_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/December_1820_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .
<http://caligraph.org/ontology/1829_event>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1820s_event> .