Table:
0
A
B
C
D
E
1
Date
Tournament
Surface
Opponent in the final
Score
2
12 January 2003
Hobart, Australia
Hard
Amy Frazier
6–2, 4–6, 6–4
3
8 August 2004
Stockholm, Sweden
Hard
Tatiana Perebiynis
6–1, 6–1
4
24 October 2004
Zürich, Switzerland
Hard (i)
Maria Sharapova
4–6, 6–2, 6–3
5
31 October 2004
Luxembourg City, Luxembourg
Hard (i)
Dinara Safina
6–3, 6–4
6
15 January 2005
Sydney, Australia
Hard
Samantha Stosur
6–7(5), 6–4, 7–5

Questions and formulas:
Question: What tournament has Samantha Stosur as the opponent in the final?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="samantha stosur"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,D2:D6="samantha stosur"),2))
Level: medium
Question: What date is the zürich, switzerland tournament?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="zürich, switzerland"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="zürich, switzerland"),1))
Level: medium
Question: What is the date of the Sydney, Australia tournament with a hard surface?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="hard")*(B1="sydney, australia")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(C2:C6="hard")*(B2:B6="sydney, australia")),1))
Level: medium