@prefix rdfs:	<http://www.w3.org/2000/01/rdf-schema#> .
@prefix sioc:	<http://rdfs.org/sioc/ns#> .
@prefix virtrdf:	<http://www.openlinksw.com/schemas/virtrdf#> .
sioc:links_to	rdfs:subPropertyOf	virtrdf:url .