@Test public void unescape() {

    String text = "Hello &amp;&LT&gt; &reg &angst; &angst &#960; &#960 &#x65B0; there &! &frac34; &copy; &COPY;";
    assertEquals("Hello &<> ® Å &angst π π 新 there &! ¾ © ©", Entities.unescape(text));
    assertEquals("&0987654321; &unknown", Entities.unescape("&0987654321; &unknown"));
}