_:vb51208420	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/claude_northwind#graph> .
_:vb51208418	<http://www.w3.org/ns/r2rml#graphMap>	_:vb51208420 .
_:vb51208420	<http://www.w3.org/2007/05/powder-s#describedby>	<https://demo.openlinksw.com/about/id/entity/http/demo.openlinksw.com/r2rml_claude_2> .
_:vb51208418	<http://www.w3.org/2007/05/powder-s#describedby>	<https://demo.openlinksw.com/about/id/entity/http/demo.openlinksw.com/r2rml_claude_2> .
_:vb51208419	<http://www.w3.org/ns/r2rml#column>	"ProductID" .
_:vb51208418	<http://www.w3.org/ns/r2rml#predicate>	<http://schema.org/orderItemNumber> .
_:vb51208418	<http://www.w3.org/ns/r2rml#objectMap>	_:vb51208419 .
_:vb51208419	<http://www.w3.org/2007/05/powder-s#describedby>	<https://demo.openlinksw.com/about/id/entity/http/demo.openlinksw.com/r2rml_claude_2> .