Table:
0
A
B
C
D
E
F
G
1
Outcome
Year
Championship
Surface
Partner
Opponents
Score
2
Winner
1971
Australian Open
Grass
Margaret Court
Joy Emerson Lesley Hunt
6–0, 6–0
3
Runner-up
1971
Wimbledon
Grass
Margaret Court
Rosemary Casals Billie Jean King
6–3, 6–2
4
Winner
1974
Australian Open (2)
Grass
Peggy Michel
Kerry Harris Kerry Melville
7–5 6–3
5
Winner
1974
Wimbledon
Grass
Peggy Michel
Helen Gourlay Karen Krantzcke
2–6, 6–4, 6–3
6
Winner
1975
Australian Open (3)
Grass
Peggy Michel
Margaret Court Olga Morozova
7–6, 7–6
7
Winner
1976
Australian Open (4)
Grass
Helen Gourlay
Renáta Tomanová Lesley Turner Bowrey
8–1

Questions and formulas:
Question: What was the surface during wimbledon in 1974?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,(C1="Wimbledon")*(B1=1974)),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G7,(C2:C7="Wimbledon")*(B2:B7=1974)),4))
Level: medium