Table:
0
A
B
C
D
E
F
1
Camp
Estimated deaths
Operational
Occupied territory
Current country of location
Primary means for mass killings
2
Auschwitz–Birkenau
1,100,000
May 1940 – January 1945
Poland
Poland
Zyklon B gas chambers
3
Bełżec
600,000
17 March 1942 – end of June 1943
General Government district
Poland
Carbon monoxide gas chambers
4
Majdanek
360,000
October 1, 1941 — July 22, 1944
General Government district
Poland
Zyklon B gas chambers
5
Maly Trostinets
200,000
Summer of 1941 to 28 June 1944
District of Reichskommissariat Ostland
Belarus
Mass shootings, Carbon monoxide van
6
Sajmište
23,000 - 47,000
28 October 1941–July 1944
Independent State of Croatia
Serbia
Carbon monoxide van
7
Sobibor
250,000
16 May 1942 – 17 October 1943
General Government district
Poland
Carbon monoxide gas chambers
8
Treblinka
800,000
22 July 1942 – 19 October 1943
General Government district
Poland
Carbon monoxide gas chambers

Questions and formulas:
Question: what's the camp with estimated deaths of 600,000
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1=600000),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,B2:B8=600000),1))
Level: medium
Question: what's the operational period with camp  sajmište
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="Sajmište"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,A2:A8="Sajmište"),3))
Level: medium
Question: what's the estimated deaths with operational period of 17 march 1942 – end of june 1943
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="17 March 1942 – end of June 1943"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,C2:C8="17 March 1942 – end of June 1943"),2))
Level: medium
Question: what's the current country of location with operational period  of summer of 1941 to 28 june 1944
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="Summer of 1941 to 28 June 1944"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,C2:C8="Summer of 1941 to 28 June 1944"),5))
Level: medium
Question: what's the occupied territory with estimated deaths of 600,000
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1=600000),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,B2:B8=600000),4))
Level: medium
Question: what's the occupied territory with operational period of may 1940 – january 1945
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="May 1940 – January 1945"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,C2:C8="May 1940 – January 1945"),4))
Level: medium