_:vb50968543	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"52" .
_:vb50968544	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"52" .
_:vb50968544	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/NorthwindQA/extension> .
_:vb50968545	<http://www.w3.org/ns/r2rml#column>	"Extension" .
_:vb50968545	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"52" .
_:vb50968543	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50968544 .
_:vb50968543	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50968545 .