 Complete the following phrase:  Roman-Taras Yosypovych Shukhevych , also known by his pseudonym Taras Chuprynka June 30, 1907  March 5, 1950, was a Ukrainian nationalist, one of the commanders of Nachtigall Battalion, a hauptmann of the German Schutzmannschaft 201 auxiliary police battalion, a military leader of the Ukrainian Insurgent Army UPA, and one of the organizers of the 