List<Review> data = dataConn.getReviewsNo(1000 * i);
System.out.println("Datasize " + data.size());
print("Naive bayes");
SupervisedTrainer trainer = new NaiveBayesGaussianTrainer();
cv.multiValidate(features, trainer, 10, data, null, 0);
print("Maximum Entropy");
trainer = new MaxEntLBFGSTrainer();
cv.multiValidate(features, trainer, 10, data, null, 0);