Subject: Eleanor Rigby
Several people seem awe-struck by this one. Kinda surprised me. I love this song, but I already know it. I can't be someone who has never heard it before, but it's interesting (to me) how people react. This one apparently has musical training. She spends 19 minutes on a two minute song.

https://www.youtube.com/watch?...

One cool thing about this song is that it doesn't have any rock instruments at all. No percussion, no guitars. Cellos and violins, for sure. I'm not well enough tuned to detect if there are also violas or other strings.