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an improvisation of a dramatic work, musical work or literary work, whether or not the improvised work is based on a pre-existing work; (prestation)
an improvisation of a dramatic work, musical work or literary work, whether or not the improvised work is based on a pre-existing work; (prestation)
an improvisation of a dramatic work, musical work or literary work, whether or not the improvised work is based on a pre-existing work;