<Li> Nikolai Bobrikov--Governor - General of Finland . Killed 30 June (O.S. 17 June) 1904 in Helsinki . </Li> <Li> Vyacheslav von Plehve--Minister of Interior . Killed 10 August (O.S. 28 July) 1904 in Saint Petersburg . </Li> <Li> Grand Duke Sergei Alexandrovich of Russia--Killed 17 February (O.S. 4 February) 1905 in Moscow . </Li> <Li> Eliel Soisalon - Soininen--Procurator of Justice of Finland . Killed 19 February (O.S. 6 February) 1905 in Helsinki . </Li>

Which of these events did not happen in the 20th century apex