<http://caligraph.org/ontology/Commercial_building_completed_in_1981>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Commercial_buildings_completed_in_1981> .
<http://caligraph.org/ontology/Office_building_completed_in_1981>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Commercial_building_completed_in_1981> .
<http://caligraph.org/ontology/Commercial_building_completed_in_1981>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Building_or_structure_completed_in_1981> .
<http://caligraph.org/ontology/Commercial_building_completed_in_1981>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Commercial_building_completed_in_the_20th_century> .
<http://caligraph.org/ontology/Hotel_building_completed_in_1981>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Commercial_building_completed_in_1981> .
<http://caligraph.org/ontology/Commercial_building_completed_in_1981>	<http://www.w3.org/2000/01/rdf-schema#label>	"Commercial building completed in 1981" .
<http://caligraph.org/ontology/Commercial_building_completed_in_1981>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .