Question about a song by immortal technique?

The song "dance with the devil" by immortal technique.. I know I've heard the piano part before but never with the rap. I tried googling it and what I could find is that its a song by Beethoven and that it was also in a movie called "love story"... neither of these help me because I don't listen to Beethoven, and I never saw that movie.. SO I think I must have heard it in a different movie. Does anyone have any ideas?