private Instances createInstance(double[] tweetData,ArrayList<String> featureNames) 
	{
		FastVector fv = createdFastVector(featureNames);
		Instances data = new Instances("isCrime", fv, 0);
		data.setClassIndex(data.numAttributes() - 1);
		data.add(new Instance(1.0, tweetData));		
		return data;
	}