_:vb51063621	<http://www.w3.org/ns/r2rml#constant>	<http://www.openlinksw.com/ontology/recruitment#lastName> .
_:vb51063620	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb51063621 .
_:vb51063622	<http://www.w3.org/ns/r2rml#column>	"last_name" .
_:vb51063620	<http://www.w3.org/ns/r2rml#objectMap>	_:vb51063622 .