Piano Music Mystery Solved

I have wanted to get my hands on the piano music that John Rubenstein plays for decades. It has haunted me. Imagine my delight to be able to listen to it through the full version of the movie available on YouTube, and discover that, in the long years since I'd seen the movie, I've actually learned the name of the piece just by coincidence. It is not written by the movie score composer, Dave Grusin. It was originally written for flute and keyboard by none other than JS Bach, although versions for solo piano are available. The title is Flute Sonata, BWV 1031, Movement II "Siciliano." It is, by the way, the same theme as the music box theme at the very beginning of the movie. Here's a beautiful performance of it by Evgeny Kissin: http://www.youtube.com/watch?v=yepl8MG6vRg