@prefix rdfs:	<http://www.w3.org/2000/01/rdf-schema#> .
@prefix ns1:	<http://opengraphprotocol.org/schema/> .
@prefix wgs84_pos:	<http://www.w3.org/2003/01/geo/wgs84_pos#> .
ns1:longitude	rdfs:subPropertyOf	wgs84_pos:long .