cv.multiValidate(features, trainer, 10, data, null, 0);
print("Pairs");
features.clear();
features.add(new WordPairFeature(10));
cv.multiValidate(features, trainer, 10, data, null, 0);
print("Specific bigram");
features.clear();
features.add(new SpecificBigramFeature(0));
cv.multiValidate(features, trainer, 10, data, null, 0);