_:vb50417437	<http://www.w3.org/ns/r2rml#predicate>	<http://schema.org/familyName> .
_:vb50417437	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50417438 .
_:vb50417438	<http://www.w3.org/ns/r2rml#column>	"nachname" .