_:vb50958512	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50958514 .
_:vb50958513	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/csv_copy/last_name> .
_:vb50958514	<http://www.w3.org/ns/r2rml#column>	"last_name" .
_:vb50958512	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50958513 .
_:vb50958514	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"15" .
_:vb50958512	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"15" .
_:vb50958513	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"15" .