Question: In what type of imprisonment where the inmates Arne Berge helped rescue during operation White Buses?

Passages:
Jeanne Daman (1918-86) is one of the Righteous Among the Nations.  She helped rescue two thousand Jewish children from the Nazis by taking them to shelters.  After the war she helped to find the children so they could be brought back to their families, and helped care for children who had survived the concentration camps.  Daman also took Jewish women to be maids in Belgian households, giving them false identity papers and ration cards, and attempting to keep them informed of where their children were hiding. The New Guinea Volunteer Rifles (NGVR) was an infantry battalion of the Australian Army.  It was initially raised as a unit of the Militia from white Australian and European expatriates in New Guinea upon the outbreak of the Second World War in 1939, before being activated for full-time service following the Japanese landings in early 1942.  NGVR personnel then helped rescue survivors of Lark Force from Rabaul in February and March 1942.  Between March and May, the NGVR monitored the Japanese bases which had been established in the Huon Gulf region, being the only Allied force in the area until the arrival of Kanga Force at Wau in May.  The battalion subsequently established observation posts overlooking the main approaches and reported on Japanese movements. Conrad Vogt-Svendsen (6 March 1914 – 1 December 1973) was a Norwegian priest.  He was assistant seamen's priest in Hamburg during Second World War, helped with the White Buses operation in 1945, and was later main priest for the deaf in Norway. Arne Berge (29 June 1908 – 13 August 1988) was a Norwegian priest.  He was seamen's priest in Hamburg during World War II, when he also worked among Scandinavian prisoners in Germany, and helped planning and carrying out the White Buses operation. Gys Jansen-Van Beek (March 31, 1919 – November 14, 2015) was a Dutch-American inventor who as a member of the Dutch resistance during World War II helped rescue members of the Allied forces and is also recognized as an Aid Giver for helping Jews escaping the Holocaust. Antoni Stefan Koper (September 6, 1906 – June 13, 1990) was active in the Polish resistance movement during World War II and served as a lieutenant in the Polish Home Army.  He helped rescue Jews from the Warsaw Ghetto and fought in the Warsaw Uprising.  After escaping from a Nazi prison camp, he first fled to London, and then emigrated to the United States.  There, he worked for the Defense Language Institute, United States Information Agency, and the Voice of America.  He died of cancer in 1990. Niels Christian Ditleff (29 October 1881 – 18 June 1956) was a Norwegian diplomat noted for his humanitarian efforts on behalf of refugees from Nazi Germany.  In spite of opposition from his own and allied governments, he initiated and led the White Buses campaign to rescue Scandinavian prisoners held in German concentration camps.  He also played an instrumental role in evacuating foreign diplomats from Warsaw during the German invasion and to rescue Jews in coordination with Nansenhjelpen. Daniel Rhoads (December 7, 1821, Paris, Illinois – December 4, 1895, San Francisco) was a California, USA, pioneer and rancher who helped rescue the Donner Party. "White Buses" was an operation undertaken by the Swedish Red Cross and the Danish government in the spring of 1945 to rescue concentration camp inmates in areas under Nazi control and transport them to Sweden, a neutral country.  Although the operation was initially targeted at saving citizens of Scandinavian countries, it rapidly expanded to include citizens of other countries. Finn Moestue Huseby (11 May 1905 – 2001) was a Norwegian priest.  He graduated as cand.theol.  in 1930.  He worked as seamen's priest in New Orleans from 1931 to 1934, in Antwerp from 1935 to 1936, and in Hamburg from 1936 to 1942.  He had to leave Germany because of a conflict with Nazi-friendly Norwegians in Germany, and assistant priest Arne Berge took over after him as the seamen's priest in Hamburg.  He was parish priest in Brandbu from 1946.

Supporting sentences:
Arne Berge (29 June 1908 – 13 August 1988) was a Norwegian priest.  He was seamen's priest in Hamburg during World War II, when he also worked among Scandinavian prisoners in Germany, and helped planning and carrying out the White Buses operation. "White Buses" was an operation undertaken by the Swedish Red Cross and the Danish government in the spring of 1945 to rescue concentration camp inmates in areas under Nazi control and transport them to Sweden, a neutral country.