Does anyone know who composed this?

[linnyk]

Hey guys!

There's this piano piece in this Alicia Keys performance I saw, it sounds like she sampled a composer (which she does sometimes), but I'm not quite sure if she did. Anyhow, I was hoping someone would know which composer and song this is (if it is in fact a composer)... It starts at 1:15. Thanks much!

[Bob]

Beethoven's Fifth Symphony?

("Yeah, but who composed this 'Beethoven's Fifth Symphony?' Tell us that!")

Ah I see.  On the piano... I think she's just improvising or maybe it was something written for that piece.  I'm not really sure.     I'm guessing it's not really from anything.