_:vb51207819	<http://www.w3.org/ns/r2rml#predicate>	<http://demo.openlinksw.com/schemas/claude_northwind#requiredDate> .
_:vb51207819	<http://www.w3.org/ns/r2rml#objectMap>	_:vb51207820 .
_:vb51207820	<http://www.w3.org/ns/r2rml#column>	"RequiredDate" .
_:vb51207820	<http://www.w3.org/ns/r2rml#datatype>	<http://www.w3.org/2001/XMLSchema#date> .