Table:
0
A
B
C
D
E
1
Date
Event
Winner
Team
Series leader
2
February 24
Tour du Haut Var
Davide Rebellin ( ITA )
Gerolsteiner
Rinaldo Nocentini ( ITA )
3
March 23
Cholet-Pays de Loire
Janek Tombak ( EST )
Mitsubishi-Jartazi
Rinaldo Nocentini ( ITA )
4
April 6
Grand Prix de Rennes
Mikhaylo Khalilov ( UKR )
Ceramica Flaminia-Bossini Docce
Jimmy Casper ( FRA )
5
April 15
Paris–Camembert
Alejandro Valverde ( ESP )
Caisse d'Epargne
Jérôme Pineau ( FRA )
6
April 17
Grand Prix de Denain
Edvald Boasson Hagen ( NOR )
Team High Road
Jimmy Casper ( FRA )
7
April 19
Tour du Finistère
David Lelay ( FRA )
Bretagne-Armor Lux
Jimmy Casper ( FRA )
8
April 20
Tro-Bro Léon
Frédéric Guesdon ( FRA )
Française des Jeux
Jimmy Casper ( FRA )
9
May 4
Trophée des Grimpeurs
David Lelay ( FRA )
Bretagne-Armor Lux
David Lelay ( FRA )
10
May 31
Grand Prix de Plumelec-Morbihan
Thomas Voeckler ( FRA )
Bouygues Télécom
David Lelay ( FRA )
11
August 3
Polynormande
Arnaud Gérard ( FRA )
Française des Jeux
Jérôme Pineau ( FRA )
12
August 31
Châteauroux Classic
Anthony Ravard ( FRA )
Agritubel
Jérôme Pineau ( FRA )
13
September 21
Grand Prix d'Isbergues
William Bonnet ( FRA )
Crédit Agricole
Jérôme Pineau ( FRA )
14
October 5
Tour de Vendée
Koldo Fernández ( ESP )
Euskaltel-Euskadi
Jérôme Pineau ( FRA )
15
October 9
Paris–Bourges
Bernhard Eisel ( AUT )
Team Columbia
Jérôme Pineau ( FRA )

Questions and formulas:
Question: What is the Series leader with a Date that is may 31?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="may 31"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="may 31"),5))
Level: medium
Question: What is the Series leader with a Date that is october 9?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="october 9"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="october 9"),5))
Level: medium