Table:
0
A
B
C
D
E
1
Date
Tournament
Winning score
Margin of victory
Runner-up
2
Mar 18, 1979
Doral-Eastern Open
–9 (67-71-69-72=279)
1 stroke
Bill Rogers
3
Jul 3, 1983
Western Open
–4 (74-71-68-71=284)
1 stroke
Tom Watson
4
Oct 30, 1983
Pensacola Open
–18 (68-68-65-65=266)
4 strokes
Lon Hinkle
5
Feb 24, 1985
Doral-Eastern Open
–4 (70-71-72-71=284)
1 stroke
Tom Kite
6
Jul 12, 1987
Anheuser-Busch Golf Classic
–17 (65-69-67-66=267)
1 stroke
Bobby Clampett
7
Mar 27, 1988
The Players Championship
–15 (65-72-67-69=273)
4 strokes
Mike Reid
8
Jul 3, 1989
Beatrice Western Open
–13 (68-67-71-69=275)
Playoff
Peter Jacobsen
9
Jul 10, 1994
Anheuser-Busch Golf Classic
–17 (67-69-65-66=267)
3 strokes
Glen Day
10
Sep 25, 1994
Hardee's Golf Classic
–15 (66-67-65-67=265)
1 stroke
Kenny Perry
11
Oct 30, 1994
The Tour Championship
–10 (66-71-69-68=274)
Playoff
Fuzzy Zoeller

Questions and formulas:
Question: What was the margin of victory on Mar 18, 1979?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="mar 18, 1979"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,A2:A11="mar 18, 1979"),4))
Level: medium