for (int j = 0; j < y.length; j++)
y[j] = "?";
// create an element sequence, extract its features and
// label it
sequence = new ElementSequence(elements, xAlphabet,
yAlphabet, x, y, document, inputAS);
labels = tagger.label(extractor.process(sequence).x);
elements = new ArrayList<Element<Object>>();
if (labels.length == chars.length) {