<http://caligraph.org/ontology/20th-century_comics_debut>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/20th-century_introduction> .
<http://caligraph.org/ontology/20th-century_introduction>	<http://www.w3.org/2000/01/rdf-schema#label>	"20th-century introduction" .
<http://caligraph.org/ontology/20th-century_introduction>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/20th-century_introduction>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:20th-century_introductions> .
<http://caligraph.org/ontology/Telecommunications-related_introduction_in_the_20th_century>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/20th-century_introduction> .
<http://caligraph.org/ontology/20th-century_introduction>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/2nd_millennium_introduction> .
<http://caligraph.org/ontology/Computer-related_introduction_in_the_20th_century>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/20th-century_introduction> .