Complex sentence: Some have the singer's' sister Kate' and the girl at the garden gate as separate people, different lengths of time since the singer left Ireland, and multiple versions of the names sung in the body of the song.
Split into simpler sentences: Some have the singer's' Sister Kate' and the girl at the garden gate as separate people. Different lengths of time since the singer left Ireland, and there are multiple versions of the names sung in the body of the song.