Table:
0
A
B
C
D
E
F
1
Season
Winner
Score
Runner-up
lost to eventual winner
lost to eventual runner-up
2
1947
US Gorée
2 - 1
ASC Jeanne d'Arc
Espoir Saint-Louis
Espérance Rufisque
3
1948
Foyer France Sénégal
4 - 0
Jeunesse Club d'Abidjan
Saint-Louisienne
Racing Club de Conakry
4
1949
Racing Club de Dakar
3 - 0
Racing Club de Conakry
Espoir Saint-Louis
USC Bassam
5
1949/50
Racing Club de Conakry
4 - 2
Espoir Saint-Louis
USC Bassam
Jeanne d'Arc (Bamako)
6
1950/51
ASC Jeanne d'Arc
3 - 1
Jeanne d'Arc (Bamako)
Africa Sports
US Indigène
7
1951/52
ASC Jeanne d'Arc
2 - 0
Etoile Sportive Porto Novo
Africa Sports
Foyer France Sénégal
8
1952/53
Jeanne d'Arc (Bamako)
3 - 1
Racing Club de Conakry
US Gorée
Jeunesse Club d'Abidjan
9
1953/54
US Gorée
1 - 0
Foyer du Soudan
Etoile Sportive Porto-Novo
Racing Club de Conakry
10
1954/55
US Gorée
7 - 0
ASEC Abidjan
AS Porto-Novo
Avenir Saint-Louis
11
1955/56
Jeanne d'Arc (Bamako)
3 - 0
ASEC Abidjan
Foyer France Sénégal
Essor
12
1956/57
Réveil de Saint-Louis
4 - 1
Africa Sports
Etoile Filante (Lomé)
Jeanne d'Arc (Bamako)
13
1957/58
Africa Sports
5 - 0
ASEC Abidjan
Foyer France Sénégal
Société Sportive de Guinée
14
1958/59
Saint-Louisienne
2 - 1
Modèle Lomé
Stella d'Abidjan
ASC Jeanne d'Arc

Questions and formulas:
Question: How many players lost to eventual winner in the season when ASC Jeanne d'Arc lost to eventual runner up?
Formula: ROWS(UNIQUE(FILTER(E1, F1="ASC Jeanne d'Arc")))
Formula2: ROWS(UNIQUE(FILTER(E2:E14, F2:F14="ASC Jeanne d'Arc")))
Level: medium
Question: What's the number of seasons i which USC Bassam lost to eventual runner-up?
Formula: ROWS(UNIQUE(FILTER(A1, F1="USC Bassam")))
Formula2: ROWS(UNIQUE(FILTER(A2:A14, F2:F14="USC Bassam")))
Level: medium
Question: In which season was Jeanne d'Arc (Bamako) the runner-up?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="Jeanne d'Arc (Bamako)"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F14,D2:D14="Jeanne d'Arc (Bamako)"),1))
Level: medium