_:vb50958392	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50958394 .
_:vb50958393	<http://www.w3.org/ns/r2rml#constant>	<http://schema.org/givenName> .
_:vb50958394	<http://www.w3.org/ns/r2rml#column>	"first_name" .
_:vb50958394	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"30" .
_:vb50958392	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"28" .
_:vb50958393	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"29" .
_:vb50958392	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50958393 .