Task: Text Categorization
Input (English): Many of its participants had been members of the Society of Salvation and the Society of Prosperity, both of which had been founded by Pavel Pestel, and which called for a Peoples Veche and a Supreme Sobor, though ultimately these folded into the Northern and Southern Societies. During it, Pyotr Kakhovsky assassinated Count Miloradovich, who had served on the Pratzen Heights, while Sergei Troubetzkoy was declared dictator. Calling for a Constitution and sparked by the abdication of Constantine I, it was put down by his brother Nicholas I and resulted in the last public executions in Russia. For ten points, name this 1825 revolt of idealistic military officers, named for the month in which it took place.
Output (English): History