<http://caligraph.org/ontology/1921_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1924_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1920s_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/20th-century_birth> .
<http://caligraph.org/ontology/1920s_birth>	<http://www.w3.org/2000/01/rdf-schema#label>	"1920s birth" .
<http://caligraph.org/ontology/1929_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1925_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1927_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1920_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1923_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1922_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1928_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .
<http://caligraph.org/ontology/1920s_birth>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/1920s_birth>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1920s_births> .
<http://caligraph.org/ontology/1926_birth>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_birth> .