public static MusicClue forText(String text)
	{
		final Matcher m = SONG_PATTERN.matcher(text);
		if (m.find())
		{
			final String song = m.group(1);
			return new MusicClue(song);
		}
		return null;
	}
@Test
	public void forTextEmptyString()
	{
		assertNull(MusicClue.forText(""));
	}