Complex sentence: The paper was a successor to Nichifor Crainic's daily "Calendarul", which had been closed down by the authorities in December 1933, just after the assassination of Premier Ion G. Duca by the Iron Guard's "Nicadori" death squad.
Split into simpler sentences: The paper was a successor to Nichifor Crainic's daily "Calendarul". The latter had been shut down by the authorities in December 1933, just after Romanian Premier Ion G. Duca was murdered by the Iron Guard's "Nicadori" death squad.