_:vb50968224	<http://www.w3.org/ns/r2rml#column>	"FirstName" .
_:vb50968222	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/NorthwindQA/firstname> .
_:vb50968223	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50968224 .
_:vb50968223	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50968222 .