<http://caligraph.org/ontology/Educational_material>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Material> .
<http://caligraph.org/ontology/Educational_material>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Educational_materials> .
<http://caligraph.org/ontology/Early_childhood_education_material>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Educational_material> .
<http://caligraph.org/ontology/Educational_material>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Educational_material>	<http://www.w3.org/2000/01/rdf-schema#label>	"Educational material" .
<http://caligraph.org/ontology/Language_education_material>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Educational_material> .
<http://caligraph.org/ontology/Museum_educational_material>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Educational_material> .
<http://caligraph.org/ontology/Science_education_material>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Educational_material> .