Table:
0
A
B
C
D
E
F
G
H
I
1
Year
Denomination
Alloy
Reverse
Diameter
Weight
Obverse
Mintage
Series
2
2007
1 Yuan
Brass
Weightlifting
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
I series
3
2007
1 Yuan
Brass
Swimming
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
I series
4
2008
1 Yuan
Brass
Archery
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
II series
5
2008
1 Yuan
Brass
Gymnastics
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
II series
6
2008
1 Yuan
Brass
Table tennis
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
II series
7
2008
1 Yuan
Brass
Fencing
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
III series
8
2008
1 Yuan
Brass
Football
25mm
6.75 gr
Emblem of the XXIX Olympiad, and the year 2008.
10000000
III series

Questions and formulas:
Question: what's the series with reverse being swimming
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:I1,D1="Swimming"),9))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:I8,D2:D8="Swimming"),9))
Level: medium
Question: what's the alloy with series being ii series
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:I1,I1="II series"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:I8,I2:I8="II series"),3))
Level: medium
Question: what's the denomination with year being 2008 and reverse being football
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:I1,(A1=2008)*(D1="Football")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:I8,(A2:A8=2008)*(D2:D8="Football")),2))
Level: medium
Question:  how many reverse with series being iii series
Formula: ROWS(UNIQUE(FILTER(D1, I1="III series")))
Formula2: ROWS(UNIQUE(FILTER(D2:D8, I2:I8="III series")))
Level: medium