Table:
0
A
B
C
D
E
F
G
H
I
1
Tournament
2006
2007
2008
2009
2010
2011
2012
2013
2
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
Grand Slam tournaments
3
Australian Open
A
A
2R
1R
3R
1R
3R
4R
4
French Open
A
1R
1R
A
2R
1R
QF
4R
5
Wimbledon
A
1R
1R
A
3R
1R
SF
2R
6
US Open
A
1R
A
2R
1R
SF
4R
4R
7
Win–Loss
0–0
0–3
1–3
1–2
5–4
5–4
14–4
10–4

Questions and formulas:
Question: Which tournament has a value of a for 2009?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:I1,E1="a"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:I7,E2:E7="a"),1))
Level: medium
Question: What is the value for 2011 when `a` is the value for 2009, and 4r is the value for 2013?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:I1,(E1="a")*(I1="4r")),7))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:I7,(E2:E7="a")*(I2:I7="4r")),7))
Level: medium