Table:
0
A
B
C
D
E
F
G
1
Perpetrator
Date
Year
Location
Country
Killed
Injured
2
Sanurip , 36
04.15 April 15
1996
Timika Airport
Indonesia
16
11
3
Chelakh, Vladislav , 19
05.27 May 27/28
2012
Arkankergen frontier post
Kazakhstan
15
0
4
Sherrill, Patrick Henry , 44
08.20 Aug. 20
1986
Edmond , OK
U.S.
14
06 6
5
Hasan, Nidal Malik , 39
11.05 Nov. 5
2009
Fort Hood , TX
U.S.
13
32
6
Barton, Mark Orrin , 44
07.27 July 27–29
1999
Atlanta , GA
U.S.
12
13
7
Alexis, Aaron , 34
09.16 Sep. 16
2013
Washington, D.C.
U.S.
12
3
8
Lz
04.32
1979.9
Fz
Tx
4.9
0.9
9
Leung Ying , 29
08.22 Aug. 22
1928
Fairfield , CA
U.S.
11
04 4
10
Tazmal Hossein
12.01 Dec. 1
1914
Naihati
India
10
11
11
Kim Won-jo, 25
05.01 May 1
1974
Kimpo
South Korea
10
03 3
12
Vaganov, Artur , 22
06.01 June 1
1997
Sida
Abkhazia
10
03 3
13
Sz
07.32
1989.9
Lz
Lz
5.9
02.9
14
Lee Wei, 41
04.05 April 5
1962
Patch
Taiwan
10
0.2 0-2+
15
Ahmed Gul, 46
04.27 April 27
2011
Kabul
Afghanistan
9
01.6 1–6
16
Smith, William Vincent, 19
04.23 April 23
1946
LST 172
U.S.
9
01 1
17
Unknown
07.29 July 29
1982
Maputo
Mozambique
9
0.0 ?
18
Moreño, Jonathan, 31
01.16 Jan. 16
2005
Kalibo
Philippines
8
29–33

Questions and formulas:
Question: What is the average Year, when Country is "U.S.", and when Location is "Edmond , OK"?
Formula: AVERAGE(FILTER(C1, (E1="u.s.")*(D1="edmond , ok")))
Formula2: AVERAGE(FILTER(C2:C18, (E2:E18="u.s.")*(D2:D18="edmond , ok")))
Level: easy
Question: What is the lowest Killed, when Perpetrator is "Sherrill, Patrick Henry , 44"?
Formula: MINIFS(F1,A1,"sherrill, patrick henry , 44")
Formula2: MINIFS(F2:F18,A2:A18,"sherrill, patrick henry , 44")
Level: easy