code: public double[][] classify(Document[] documents) throws Exception {
  		double[][] predictions = new double[documents.length][lexicon
  				.getLabelNum()];
  		for (int d = 0; d < documents.length; d++) {
  			Document doc = documents[d];
  			predictions[d] = classify(doc);
  		}
  		return predictions;
  	}
docs: Returns the probabilities for each label or the raw scores if the model
  does not support probabilities
  *