SRL for [commemorated]: Hungary declared itself a democracy and for the first time openly [commemorated] the anniversary of the 1956 anti - Stalinist uprising that was crushed by the Soviet Union .
ARG-0: Hungary | ARG-M-TMP: for the first time | ARG-M-MNR: openly | ARG-1: the anniversary of the 1956 anti - Stalinist uprising that was crushed by the Soviet Union