Detailed Instructions: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Q: The Grandes etudes de Paganini, S. 141, are a series of six etudes for the piano by Franz Liszt, revised in 1851 from an earlier version (published as Etudes d'execution transcendante d'apres Paganini, S.140, in 1838).
A:
On which instrument(s) was Grandes etudes de Paganini created to be played on?