<http://caligraph.org/ontology/1921_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1920s_ballet_premiere>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:1920s_ballet_premieres> .
<http://caligraph.org/ontology/1926_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1930_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1927_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1922_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1928_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1920_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1924_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1925_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1923_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .
<http://caligraph.org/ontology/1920s_ballet_premiere>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/1920s_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Ballet_premiere> .
<http://caligraph.org/ontology/1920s_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#label>	"1920s ballet premiere" .
<http://caligraph.org/ontology/1929_ballet_premiere>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/1920s_ballet_premiere> .