<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Russian_singer> .
<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Opera_singer> .
<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/List_of_Russian_opera_singers> .
<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://caligraph.org/ontology/Russian_male_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Russian_opera_singer> .
<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#label>	"Russian opera singer" .
<http://caligraph.org/ontology/21st-century_Russian_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Russian_opera_singer> .
<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Russian_opera_singers> .
<http://caligraph.org/ontology/Russian_women_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Russian_opera_singer> .
<http://caligraph.org/ontology/Russian_opera_singer>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://en.wikipedia.org/wiki/Category:Russian_opera_singers_by_century> .
<http://caligraph.org/ontology/Opera_singer_of_the_Russian_Empire>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Russian_opera_singer> .
<http://caligraph.org/ontology/20th-century_Russian_opera_singer>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://caligraph.org/ontology/Russian_opera_singer> .