Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Camp | Estimated deaths | Operational | Occupied territory | Current country of location | Primary means for mass killings |
| --- | --- | --- | --- | --- | --- |
| Auschwitz–Birkenau | 1,100,000 | May 1940 – January 1945 | Poland | Poland | Zyklon B gas chambers |
| Bełżec | 600,000 | 17 March 1942 – end of June 1943 | General Government district | Poland | Carbon monoxide gas chambers |
| Majdanek | 360,000 | October 1, 1941 — July 22, 1944 | General Government district | Poland | Zyklon B gas chambers |
| Maly Trostinets | 200,000 | Summer of 1941 to 28 June 1944 | District of Reichskommissariat Ostland | Belarus | Mass shootings, Carbon monoxide van |
| Sajmište | 23,000 - 47,000 | 28 October 1941–July 1944 | Independent State of Croatia | Serbia | Carbon monoxide van |
| Sobibor | 250,000 | 16 May 1942 – 17 October 1943 | General Government district | Poland | Carbon monoxide gas chambers |
| Treblinka | 800,000 | 22 July 1942 – 19 October 1943 | General Government district | Poland | Carbon monoxide gas chambers |
Question:
what's the occupied territory with operational period of may 1940 – january 1945
Answer:
Poland