_:vb50806907	<http://www.w3.org/ns/r2rml#objectMap>	_:vb50806908 .
_:vb50806907	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb50806906 .
_:vb50806906	<http://www.w3.org/ns/r2rml#constant>	<http://rs.tdwg.org/dwc/terms/catalogNumber> .
_:vb50806908	<http://www.w3.org/ns/r2rml#column>	"ID" .