@Nullable
protected IRI getIriByLabel(@Nonnull OWLOntology ontology,
@Nonnull String label) {
for (OWLAnnotationAssertionAxiom aa : ontology
.getAxioms(AxiomType.ANNOTATION_ASSERTION)) {
OWLAnnotationValue v = aa.getValue();
OWLAnnotationProperty property = aa.getProperty();
if (property.isLabel() && v instanceof OWLLiteral) {
if (label.equals(((OWLLiteral) v).getLiteral())) {
OWLAnnotationSubject subject = aa.getSubject();
if (subject instanceof IRI) {