sentences:  This is thought to refer to Mengele's academic supervisor, Otmar Freiherr von Verschuer, director from October 1942 of the Kaiser Wilhelm Institute of Anthropology, Human Heredity, and Eugenics in Berlin-Dahlem.There were around 9.5 million Jews in Europe in 1933.Most heavily concentrated in the east, the pre-war population was 3.5 million in Poland; 3 million in the Soviet Union; nearly 800,000 in Romania, and 700,000 in Hungary.