Original sentence: The controversy centers on whether referring to any Autonomous Community of Spain as a "nation" may go against Article 2 and the Catalan claim to be a nación rather than a nacionalidad has separatist overtones subversive of the "indissoluble unity" of Spain
Edited sentence: The controversy centers on the fact that referring to any Autonomous Community of Spain as a "nation" goes against Article 2 and on whether or not the Catalan claim to be a nación rather than a nacionalidad has separatist overtones subversive of the "indissoluble unity" of Spain