_:vb39924	<http://www.w3.org/ns/r2rml#objectMap>	_:vb39926 .
_:vb39926	<http://www.w3.org/ns/r2rml#column>	"ISBN" .
_:vb39924	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb39925 .
_:vb39925	<http://www.w3.org/ns/r2rml#constant>	<http://purl.org/ontology/bibo/isbn> .