Complex sentence: Between 1943 and January 1945 during World War II, the camp in Świętochłowice operated as German Nazi Arbeitslager, labour subcamp ("Arbeitslager Eintrachtshütte") or Eintrachthütte concentration camp of the Nazi concentration camp Auschwitz.
Split into simpler sentences: Between 1943 and January 1945 during World War II, the camp in Świętochłowice operated as German Nazi Arbeitslager. It was a labour subcamp ("Arbeitslager Eintrachtshütte") or the Eintrachthütte concentration camp of the Nazi concentration camp Auschwitz.