Complex sentence: In the autumn of 1919, the Armenian Revolutionary Federation which was part of Armenian national liberation movement gave a verdict to punish the executors of the Armenian Genocide was decided by the Ninth World Congress of Armenian resistance.
Split into simpler sentences: In the autumn of 1919, the Armenian Revolutionary Federation which was part of Armenian national liberation movement gave a verdict to punish the executors of the Armenian Genocide. It was decided by the Ninth World Congress of Armenian resistance.