<prompt> Translate the following text to EnglishDouglas Hofstadter, mwanamuziki wa piano wa chuo kikuu cha Indiana, amecheza moja ya nyimbo za Chopin za Cope na ameshangazwa na uhalisi wake.  <response>: Indiana Universitys Douglas Hofstadter, an amateur pianist, recently played one of Copes fake Chopin mazurkas, and told New Scientist he was stunned by its seeming authenticity. 