@prefix rdfs:	<http://www.w3.org/2000/01/rdf-schema#> .
@prefix ns1:	<http://www.openlinksw.com/schemas/opengraph#> .
@prefix dct:	<http://purl.org/dc/terms/> .
ns1:birthday	rdfs:subPropertyOf	dct:date .
@prefix dc:	<http://purl.org/dc/elements/1.1/> .
ns1:birthday	rdfs:subPropertyOf	dc:date .
@prefix dbo:	<http://dbpedia.org/ontology/> .
ns1:birthday	rdfs:subPropertyOf	dbo:Date .
@prefix owl:	<http://www.w3.org/2002/07/owl#> .
@prefix foaf:	<http://xmlns.com/foaf/0.1/> .
ns1:birthday	owl:equivalentProperty	foaf:birthday .
@prefix vcard2006:	<http://www.w3.org/2006/vcard/ns#> .
ns1:birthday	owl:equivalentProperty	vcard2006:BDAY ,
		dbo:BirthDate .