_:vb51207842	<http://www.w3.org/ns/r2rml#column>	"Quantity" .
_:vb51207841	<http://www.w3.org/ns/r2rml#objectMap>	_:vb51207842 .
_:vb51207841	<http://www.w3.org/ns/r2rml#predicate>	<http://schema.org/orderQuantity> .