camp estimated deaths                        operational                      occupied territory current country of location       primary means for mass killings
0  auschwitz - birkenau          1100000            may 1940 - january 1945                                  poland                      poland                 zyklon b gas chambers
1                bełżec           600000   17 march 1942 - end of june 1943             general government district                      poland          carbon monoxide gas chambers
2              majdanek           360000  october 1 , 1941 - july 22 , 1944             general government district                      poland                 zyklon b gas chambers
3       maly trostinets           200000     summer of 1941 to 28 june 1944  district of reichskommissariat ostland                     belarus  mass shootings , carbon monoxide van
4              sajmište    23000 - 47000        28 october 1941 - july 1944            independent state of croatia                      serbia                   carbon monoxide van
5               sobibor           250000      16 may 1942 - 17 october 1943             general government district                      poland          carbon monoxide gas chambers
6             treblinka           800000     22 july 1942 - 19 october 1943             general government district                      poland          carbon monoxide gas chambers

Table as JSON:
{"camp":{"0":"auschwitz - birkenau","1":"bełżec","2":"majdanek","3":"maly trostinets","4":"sajmište","5":"sobibor","6":"treblinka"},"estimated deaths":{"0":"1100000","1":"600000","2":"360000","3":"200000","4":"23000 - 47000","5":"250000","6":"800000"},"operational":{"0":"may 1940 - january 1945","1":"17 march 1942 - end of june 1943","2":"october 1 , 1941 - july 22 , 1944","3":"summer of 1941 to 28 june 1944","4":"28 october 1941 - july 1944","5":"16 may 1942 - 17 october 1943","6":"22 july 1942 - 19 october 1943"},"occupied territory":{"0":"poland","1":"general government district","2":"general government district","3":"district of reichskommissariat ostland","4":"independent state of croatia","5":"general government district","6":"general government district"},"current country of location":{"0":"poland","1":"poland","2":"poland","3":"belarus","4":"serbia","5":"poland","6":"poland"},"primary means for mass killings":{"0":"zyklon b gas chambers","1":"carbon monoxide gas chambers","2":"zyklon b gas chambers","3":"mass shootings , carbon monoxide van","4":"carbon monoxide van","5":"carbon monoxide gas chambers","6":"carbon monoxide gas chambers"}}