_:vb51208705	<http://www.w3.org/ns/r2rml#graphMap>	_:vb51208707 .
_:vb51208707	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/claude_northwind#graph> .
_:vb51208705	<http://www.w3.org/ns/r2rml#predicate>	<http://xmlns.com/foaf/0.1/firstName> .
_:vb51208705	<http://www.w3.org/ns/r2rml#objectMap>	_:vb51208706 .
_:vb51208706	<http://www.w3.org/ns/r2rml#column>	"FirstName" .