<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s>	<http://www.w3.org/2000/01/rdf-schema#label>	"Symbol introduced in the 1970s" .
<http://caligraph.org/ontology/Symbol_introduced_in_1972>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1979>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1970>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1971>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1973>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1978>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Symbols_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1975>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_1977>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol> .
<http://caligraph.org/ontology/Symbol_introduced_in_1974>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .
<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s>	<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_1976>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Symbol_introduced_in_the_1970s> .