Complex sentence: There was an underground weapon production, independent underground press etc. Jewish population was forced to live in a local ghetto, ca 11 thousand Jews were murdered by the Nazi in 1943-1944.
Split into simpler sentences: There was an underground weapon production, independent underground press, etc. The Jewish population was forced to live in a local ghetto. About 11 thousand Jews were murdered by the Nazis in 1943-1944.