<http://caligraph.org/ontology/History_book_about_the_Middle_Ages>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:History_books_about_the_Middle_Ages> .
<http://caligraph.org/ontology/History_book_about_the_Middle_Ages>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/History_book_about_historical_eras> .
<http://caligraph.org/ontology/History_book_about_the_Middle_Ages>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/RestrictionHasValue_nonFictionSubject_Middle%20Ages> .
<http://caligraph.org/ontology/History_book_about_the_Middle_Ages>	<http://www.w3.org/2000/01/rdf-schema#label>	"History book about the Middle Ages" .
<http://caligraph.org/ontology/History_book_about_the_Byzantine_Empire>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/History_book_about_the_Middle_Ages> .
<http://caligraph.org/ontology/History_book_about_the_Middle_Ages>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .