Table:
0
A
B
C
D
E
1
Date
Tournament
Surface
Opponent in the final
Score
2
3 November 1991
Scottsdale , USA
Hard
Chanda Rubin
7–5, 6–1
3
10 November 1991
Nashville , USA
Hard (i)
Katrina Adams
6–2, 6–4
4
19 April 1992
Pattaya , Thailand
Hard
Andrea Strnadová
7–5, 3–6, 7–5
5
13 February 1994
Linz , Austria
Carpet (i)
Meike Babel
6–1, 4–6, 7–6 (7–3)
6
17 April 1994
Pattaya , Thailand
Hard
Patty Fendick
6–7 (5–7) , 7–6 (7–5) , 6–2
7
30 April 1995
Zagreb , Croatia
Clay
Silke Meier
6–4, 6–3
8
3 March 1996
Linz , Austria
Carpet (i)
Julie Halard-Decugis
6–2, 6–4

Questions and formulas:
Question: On what type of surface did they play on 13 February 1994?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="13 february 1994"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="13 february 1994"),3))
Level: medium
Question: In which tournament was Silke Meier the opponent in the final?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="silke meier"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,D2:D8="silke meier"),2))
Level: medium