_:vb50967527	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"21" .
_:vb50967528	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"21" .
_:vb50967527	<http://www.w3.org/ns/r2rml#joinCondition>	_:vb50967528 .
_:vb50967527	<http://www.w3.org/ns/r2rml#parentTriplesMap>	<urn:demo:r2rml:northwind:tables#TriplesMapProducts> .
_:vb50967528	<http://www.w3.org/ns/r2rml#child>	"CategoryID" .
_:vb50967528	<http://www.w3.org/ns/r2rml#parent>	"CategoryID" .