_:vb50958397	<http://www.w3.org/ns/r2rml#column>	"last_name" .
_:vb50958396	<http://www.w3.org/ns/r2rml#constant>	<http://schema.org/familyName> .
_:vb50958395	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"32" .
_:vb50958395	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50958397 .
_:vb50958397	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"33" .
_:vb50958395	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50958396 .
_:vb50958396	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"32" .