<http://caligraph.org/ontology/Symbol_introduced_in_1945>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Symbols_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol> .
<http://caligraph.org/ontology/Symbol_introduced_in_1946>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1948>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s>	<http://www.w3.org/2000/01/rdf-schema#label>	"Symbol introduced in the 1940s" .
<http://caligraph.org/ontology/Symbol_introduced_in_1941>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1949>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1943>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1947>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Symbol_introduced_in_1940>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1940s> .