Complex sentence: While Farinacci declared himself "honored" by the task, he could not prevent Dumini from receiving a five-year prison sentence, of which he only served eleven months, benefitting from an amnesty ordered by Mussolini.
Split into simpler sentences: While Farinacci declared himself "honored" by the task, he could not prevent Dumini from receiving a five-year prison sentence. Of these, he only served eleven months, benefitting from an amnesty ordered by Mussolini.