An activist holds a placard reading "Free Sentsov" as others hold pictures of 70 Ukrainian political prisoners jailed in Russia (including the sailors taken in the Azov Sea conflict) during their rally in front of the EU Embassy in Kiev on December 11, 2018. - A Ukrainian film director Oleg Sentsov, who is convicted to 20 years in prison for "plotting terrorist acts" in Russia-annexed Crimea, will be awarded for the 2018 Sakharov Prize for Freedom of Thought on December 12, 2018. The activists rally at the embassy to remind on the anniversary of the Universal Declaration of Human Rights that there are still some 100 political prisoners in Russia and Crimea, including recently captured 24 Ukrainian sailors, and more than a hundred prisoners in eastern Ukraine regions under Russian-backed separatists. (Photo by Sergei SUPINSKY / AFP)

An activist holds a placard reading "Free Sentsov" as others hold pictures of 70 Ukrainian political prisoners jailed in Russia (including the sailors taken in the Azov Sea conflict) during their rally in front of the EU Embassy in Kiev on December 11, 2018. - A Ukrainian film director Oleg Sentsov, who is convicted to 20 years in prison for "plotting terrorist acts" in Russia-annexed Crimea, will be awarded for the 2018 Sakharov Prize for Freedom of Thought on December 12, 2018. The activists rally at the embassy to remind on the anniversary of the Universal Declaration of Human Rights that there are still some 100 political prisoners in Russia and Crimea, including recently captured 24 Ukrainian sailors, and more than a hundred prisoners in eastern Ukraine regions under Russian-backed separatists. (Photo by Sergei SUPINSKY / AFP)

Activists hold placards reading "Free Sentsov" as others hold pictures of 70 Ukrainian political prisoners jailed in Russia (including the sailors taken in the Azov Sea conflict) during their rally in front of the EU Embassy in Kiev on December 11, 2018. - A Ukrainian film director Oleg Sentsov, who is convicted to 20 years in prison for "plotting terrorist acts" in Russia-annexed Crimea, will be awarded for the 2018 Sakharov Prize for Freedom of Thought on December 12, 2018. The activists rally at the embassy to remind on the anniversary of the Universal Declaration of Human Rights that there are still some 100 political prisoners in Russia and Crimea, including recently captured 24 Ukrainian sailors, and more than a hundred prisoners in eastern Ukraine regions under Russian-backed separatists. (Photo by Sergei SUPINSKY / AFP)

An activist holds picture of Ukrainian sailor taken in the Azov Sea conflict as the others hold the pictures of 70 Uklrainian political prisoners jailed in Russia during their rally in front of the EU Embassy in Kiev on December 11, 2018. - A Ukrainian film director Oleg Sentsov, who is convicted to 20 years in prison for "plotting terrorist acts" in Russia-annexed Crimea, will be awarded for the 2018 Sakharov Prize for Freedom of Thought on December 12, 2018. The activists rally at the embassy to remind on the anniversary of the Universal Declaration of Human Rights that there are still some 100 political prisoners in Russia and Crimea, including recently captured 24 Ukrainian sailors, and more than a hundred prisoners in eastern Ukraine regions under Russian-backed separatists. (Photo by Sergei SUPINSKY / AFP)

An activist holds pictures of Ukrainian sailors taken in the Azov Sea conflict as the others hold the pictures of 70 Ukrainian political prisoners jailed in Russia during their rally in front of the EU Embassy in Kiev on December 11, 2018. - A Ukrainian film director Oleg Sentsov, who is convicted to 20 years in prison for "plotting terrorist acts" in Russia-annexed Crimea, will be awarded for the 2018 Sakharov Prize for Freedom of Thought on December 12, 2018. The activists rally at the embassy to remind on the anniversary of the Universal Declaration of Human Rights that there are still some 100 political prisoners in Russia and Crimea, including recently captured 24 Ukrainian sailors, and more than a hundred prisoners in eastern Ukraine regions under Russian-backed separatists. (Photo by Sergei SUPINSKY / AFP)

An activist holds a flag of Ukrainian Navy and a picture of a sailor taken in the Azov Sea conflict during a rally in front of the EU Embassy in Kiev on December 11, 2018. - A Ukrainian film director Oleg Sentsov, who is convicted to 20 years in prison for "plotting terrorist acts" in Russia-annexed Crimea, will be awarded for the 2018 Sakharov Prize for Freedom of Thought on December 12, 2018. The activists rally at the embassy to remind on the anniversary of the Universal Declaration of Human Rights that there are still some 100 political prisoners in Russia and Crimea, including recently captured 24 Ukrainian sailors, and more than a hundred prisoners in eastern Ukraine regions under Russian-backed separatists. (Photo by Sergei SUPINSKY / AFP)