/** Called by {@link AbstractPOSTagger#getLabel()}. */
private String getAutoLabel(StringFeatureVector vector, POSState state)
{
Pair<StringPrediction,StringPrediction> ps = s_models[0].predictTwo(vector);
StringPrediction fst = ps.o1;
StringPrediction snd = ps.o2;
if (fst.score - snd.score < 1)
state.add2ndLabel(snd.label);
return fst.label;