_:vb50968237	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/NorthwindQA/address> .
_:vb50968238	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50968239 .
_:vb50968238	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50968237 .
_:vb50968239	<http://www.w3.org/ns/r2rml#column>	"Address" .