Table:
0
A
B
C
D
E
F
1
Week
Date
Opponent
Result
Venue
Attendance
2
1
September 17, 1961
Detroit Lions
L 17-13
Milwaukee County Stadium
44,307
3
2
September 24, 1961
San Francisco 49ers
W 30-10
City Stadium
38,669
4
3
October 1, 1961
Chicago Bears
W 24-0
City Stadium
38,669
5
4
October 8, 1961
Baltimore Colts
W 45-7
City Stadium
38,669
6
5
October 15, 1961
at Cleveland Browns
W 49-17
Cleveland Stadium
75,042
7
6
October 22, 1961
at Minnesota Vikings
W 33-7
Metropolitan Stadium
42,007
8
7
October 29, 1961
Minnesota Vikings
W 28-10
Milwaukee County Stadium
44,112
9
8
November 5, 1961
at Baltimore Colts
L 45-21
Memorial Stadium
57,641
10
9
November 12, 1961
at Chicago Bears
W 31-28
Wrigley Field
49,711
11
10
November 19, 1961
Los Angeles Rams
W 35-17
City Stadium
38,669
12
11
November 23, 1961
at Detroit Lions
W 17-9
Tiger Stadium
55,662
13
12
December 3, 1961
New York Giants
W 20-17
Milwaukee County Stadium
47,012
14
13
December 10, 1961
at San Francisco 49ers
L 22-21
Kezar Stadium
55,722
15
14
December 17, 1961
at Los Angeles Rams
W 24-17
Los Angeles Memorial Coliseum
49,169

Questions and formulas:
Question: Who was the opponent at memorial stadium?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="memorial stadium"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,E2:E15="memorial stadium"),3))
Level: medium