for (int ii = 0; ii < data.size(); ii++) {
if (instancesWithConstraints.get(ii)) {
boolean noLabel = data.get(ii).getTarget() == null;
if (noLabel) {
data.get(ii).unLock();
data.get(ii).setTarget(new NullLabel((LabelAlphabet)data.getTargetAlphabet()));
}
unlabeled.add(data.get(ii));
}
}