_:vb50780046	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50780047 .
_:vb50780047	<http://www.w3.org/ns/r2rml#column>	"number" .
_:vb50780046	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50780045 .
_:vb50780045	<http://www.w3.org/ns/r2rml#constant>	<http://www.w3.org/2000/01/rdf-schema#label> .