 Complete the following phrase:  The Ústredňa Židov ÚŽ; English: Jewish Center was the Judenrat in Bratislava that was imposed on the Jewish community of the Axis-aligned state of Slovakia to implement Nazi orders during the Holocaust. It was formed on the advice of SS Schutzstaffel official Dieter Wisliceny; the first leader, Heinrich Schwartz, was removed after refusing to cooperate with Nazi demands and replaced by the ineffectual Arpad Sebestyen. The collaborationist Department of Special Affairs run by Karol Hochberg aided the authorities in confiscating Jewish property and collecting information that was used to arrest and deport Jews. Nevertheless, most of the ÚŽ members focused on providing opportunities for emigration and improving the social welfare of Jews remaining in Slovakia, although they were hampered by the dwindling resources of the community. In addition, the ÚŽ attempted to resist deportation by bribing Slovak officials, retraining Jews who had been expelled from their previous profession, and improving and expanding labor camps for Jews in Slovakia. The underground resistance organization that ran under its auspices, the Working Group, took over the ÚŽ leadership in December 1943. Since its formation in early 1942, the Working Group had used the ÚŽ as cover for its illegal rescue activities. After the 