Task: Text Categorization
Input (English): Despite Mikhail Miloradovichs death during this event, there have been allegations that he was actually a leader, and that his death was an accident. Another leader, knyaz Sergei Trubetskoy, took refuge in the Habsburg embassy until he was arrested the following day. In the aftermath of this event, Aleksandr Griboyedov managed to wriggle his way out of culpability, though he had had significant associations with Kchelbecker. A key cause of failure was that the Northern and Southern Societies failed to cooperate, and many of their potential allies deserted them, including General Aleksei Yermolov. The grand plans made by Pavel Pestel and others to free the serfs and end autocracy were damaged, partly by the abdication of their original choice for tsar, Konstantin. For ten points name this abortive 1825 revolution in St. Petersburg against Nikolai II.
Output (English): History