_:vb51208687	<http://www.w3.org/ns/r2rml#graphMap>	_:vb51208689 .
_:vb51208688	<http://www.w3.org/ns/r2rml#column>	"OrderDate" .
_:vb51208687	<http://www.w3.org/ns/r2rml#objectMap>	_:vb51208688 .
_:vb51208687	<http://www.w3.org/ns/r2rml#predicate>	<http://schema.org/orderDate> .
_:vb51208688	<http://www.w3.org/ns/r2rml#datatype>	<http://www.w3.org/2001/XMLSchema#date> .
_:vb51208689	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/claude_northwind#graph> .