<http://caligraph.org/ontology/Billboard_Hot_100_number_ones_of_1981>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://www.w3.org/2002/07/owl#Thing> .
<http://caligraph.org/ontology/Billboard_Hot_100_number_ones_of_1981>	<http://www.w3.org/2000/01/rdf-schema#label>	"Billboard Hot 100 number ones of 1981" .
<http://caligraph.org/ontology/Billboard_Hot_100_number_ones_of_1981>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Billboard_Hot_100_number_ones_of_1981>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_Billboard_Hot_100_number_ones_of_1981> .