Table:
0
A
B
C
D
E
1
Date
Visitor
Score
Home
Record
2
May 1
Pittsburgh Penguins
3–6
Boston Bruins
1–0
3
May 3
Pittsburgh Penguins
4–5 (OT)
Boston Bruins
2–0
4
May 5
Boston Bruins
1–4
Pittsburgh Penguins
2–1
5
May 7
Boston Bruins
1–4
Pittsburgh Penguins
2–2
6
May 9
Pittsburgh Penguins
7–2
Boston Bruins
2–3
7
May 11
Boston Bruins
3–5
Pittsburgh Penguins
2–4

Questions and formulas:
Question: Who was the visiting team on May 7?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="may 7"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,A2:A7="may 7"),2))
Level: medium