for (OWLOntologyChange chg : changes) {
final Set<OWLEntity> entities = chg.getSignature();
Set<OWLEntity> processed = new HashSet<OWLEntity>(entities.size());
if(chg.isAxiomChange()) {
chg.getAxiom().accept(new OWLAxiomVisitorAdapter() {
@Override
public void visit(OWLAnnotationAssertionAxiom axiom) {
if(axiom.getSubject() instanceof IRI) {
entities.addAll(project.getRootOntology().getEntitiesInSignature((IRI) axiom.getSubject(), true));
}