_:vb50911331	<http://www.w3.org/ns/r2rml#column>	"hid" .
_:vb50911329	<http://www.w3.org/ns/r2rml#constant>	<http:/schema.org/identifier> .
_:vb50911330	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50911329 .
_:vb50911330	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50911331 .