private static boolean hasSameClassifications(
			ArrayList<HashMap<String, String>> examples, String goalAttribute) {
		String g = "";
		HashMap<String, String> example = examples.get(0);
		g = example.get(goalAttribute);
		for (int i = 1; i < examples.size(); i++) {
			example = examples.get(i);
			if (!g.equals("") && !example.get(goalAttribute).equals(g)) {
				return false;
			}
		}
		return true;
	}