Table:
0
A
B
C
D
E
1
Player
Country
Year(s) won
Total
To par
2
Larry Nelson
United States
1981 , 1987
146
+6
3
John Mahaffey
United States
1978
146
+6
4
John Daly
United States
1991
146
+6
5
Paul Azinger
United States
1993
149
+9
6
Bob Tway
United States
1986
149
+9
7
David Graham
Australia
1979
149
+9
8
Jack Nicklaus
United States
1963 , 1971 , 1973 1975 , 1980
150
+10
9
Hubert Green
United States
1985
150
+10

Questions and formulas:
Question: Who is the player that won in the year 1978?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1=1978),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,C2:C9=1978),1))
Level: medium