Task: Text Categorization
Input (English): One king of this name and number subdued rebellious forces in Argyll and gave up his claim to English land in the Peace of York; that ruler assisted the English barons in threatening King John. A pope of this name and number gave his blessing to William the Conquerers invasion of England. Another ruler of this name and number had ministers like Dmitry Milyutin and Pyotr Shuvalov, and that ruler suppressed the January uprising in Poland. That same ruler also sold Alaska to the United States and set up the zemstvo system. That tsar of this name and number ended the Crimean War after succeeding Nicholas I. For 10 points, give the name and number of the tsar who was assassinated by Peoples Will after earlier undertaking the 1861 emancipation of the serfs.
Output (English): History