public Object nextEntity(char ampersand) throws JSONException {
		StringBuffer sb = new StringBuffer();
		for(;;) {
			char c = next();
			if(Character.isLetterOrDigit(c) || c == '#') {
				sb.append(Character.toLowerCase(c));
			} else if(c == ';') {
				break;
			} else {
				throw syntaxError("Missing ';' in XML entity: &" + sb);
			}
		}
		String string = sb.toString();
		Object object = entity.get(string);
		return object != null ? object : ampersand + string + ";";
	}