Amalia van Solmsstraat 20, Groningen Previous house Next house Residents in June 1941 Machiel Moritz Polak 1887 - 1942 Klaartje Polak-Hartog 1891 - 1942 Joseph Mozes Polak 1926 - 1943 Residents in June 1941 Ingeborg Johanna Cohen-Frankenstein 1919 - 1944 Margot Cohen-Frankenstein 1921 - 1942