He seems somewhat political like one of our American leftist activists who give conferences about genocide of millions of Natives etc  I have two history books about Ukraine written by the top scholarshistorians in the field of Ukrainian history both published by the University of Toronto press Paul Magosci and Orest Subtelny  The former doesnt give exact numbers but states that the Austrians interred tens of thousands of whom thousands died and mentions Talerhof  Subtelny menntions hundreds being executed without trial and that thousands died in the Talerhof concentration camp  So the figure of  executions seems outlandish and the fact that both of those other guys missed it is significant  regards