public static ArrayList<String> getAnswerListByXMLElem(XMLElement root) {
		ArrayList<String> answerList = new ArrayList<String>();
		for (int i = 0; i < root.childList.size(); i++) {
			XMLElement elem = root.childList.get(i);
			if (!elem.name.equals("answer")) 
				System.out.println("Answer list unexpected name " + elem.name);
			answerList.add(elem.content);
		}
		return answerList;
	}