Table:
0
A
B
C
D
E
1
Date
Visitor
Score
Home
Record
2
October 6
Detroit
2 – 3
Colorado
0–1–0
3
October 8
Detroit
3 – 1
Edmonton
1–1–0
4
October 9
Detroit
5 – 3
Vancouver
2–1–0
5
October 13
Edmonton
0 – 9
Detroit
3–1–0
6
October 15
Detroit
5 – 5
Winnipeg
3–1–1
7
October 17
Calgary
3 – 3
Detroit
3–1–2
8
October 19
Detroit
2 – 4
New Jersey
3–2–2
9
October 21
Boston
2 – 4
Detroit
4–2–2
10
October 24
Ottawa
2 – 1
Detroit
4–3–2
11
October 27
Detroit
3 – 0
Calgary
5–3–2
12
October 30
Detroit
2 – 3
Winnipeg
5–4–2

Questions and formulas:
Question: What date is the visitor Ottawa?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ottawa"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,B2:B12="ottawa"),1))
Level: medium